JP7375729B2 - display device - Google Patents

Description

The present invention relates to a display device in which a transparent protection member and a display body are attached to a frame body having a flange.

Conventionally, this type of display device includes a liquid crystal display panel, a transparent protective member that covers the liquid crystal display panel, and a frame body having an opening and a flange for attaching a transparent protective plate inside the opening. A device in which a liquid crystal display panel is arranged has been proposed (for example, Patent Document 1). In this display device, glass is used as the transparent protection plate, and the tip of the surface of the flange facing the transparent protection member is an inclined surface, so that the transparent protection member and the tip of the flange The configuration is such that they are spaced apart.

Japanese Patent Application Publication No. 2015-184397

In the above display device, when an external impact is applied to the transparent protective member, the corner at the tip of the flange of the transparent protective member This structure reduces the shear stress generated at the contact area with the transparent protection member, thereby suppressing damage to the transparent protection member.

On the other hand, in this type of display device, the flange of the frame body is cut off at the tip, so the tip of the flange is stepped, and the transparent protective member is deformed toward the flange due to external impact, etc. At this time, the transparent protection member deforms with a large curvature along the step formed by the flange. In the display device described in Patent Document 1, in such a case, although the shear stress at the portion of the transparent protective member that comes into contact with the corner portion is alleviated, the shear stress due to the deformation along the step by the flange portion is reduced. There is a concern that the transparent protective member may be damaged.

In view of the above points, the present invention aims to suppress damage to the transparent protective member due to a step caused by the flange in a display device in which a transparent protective member and a display body are attached to a frame body having a flange. purpose.

In order to achieve the above object, the display device according to claim 1 includes a display section (3) for displaying various images, a transparent protection member (2) that covers the display section, and an end portion side of the transparent protection member. The frame body (4) has a flange (41) to which the flange is attached, the surface of the flange facing the transparent protection member is one surface (41a), and the portion of the one surface located at the tip of the flange is one surface tip. (411), a step-reducing member (6) having a step-reducing portion (62) disposed adjacent to the tip end on one side and having an inclined surface (62a) inclined away from the transparent protection member; The inclined surface forms a continuous plane or curved surface together with the one-sided tip.

According to this, even if the transparent protective member is deformed toward the flange side of the frame due to an external impact, etc., the flat surface or Excessive deformation of the transparent protection member is suppressed by the step relief member including the sloped surface forming a curved surface. Therefore, the level difference caused by the discontinuation of the tip of the flange on the frame body is reduced by the level difference mitigation member, which in turn suppresses the deformation of the part of the transparent protection member that comes into contact with the level difference and the resulting damage, resulting in highly reliable display. It becomes a device.

Note that the reference numerals in parentheses attached to each component etc. indicate an example of the correspondence between the component etc. and specific components etc. described in the embodiments to be described later.

FIG. 1 is a front view showing a display device according to a first embodiment. FIG. 2 is a cross-sectional view showing a cross-sectional configuration taken along line II-II in FIG. 1. FIG. FIG. 3 is an enlarged cross-sectional view of region III in FIG. 2; 4 is a diagram showing a display device of a comparative example, and is a sectional view corresponding to FIG. 3. FIG. FIG. 7 is an explanatory diagram for explaining damage to a transparent protection member caused by a step caused by a flange of a frame in a display device of a comparative example. FIG. 3 is an explanatory diagram for explaining suppression of damage to the transparent protection member in the display device of the first embodiment. FIG. 3 is a diagram showing a display device according to a second embodiment, and is a cross-sectional view corresponding to FIG. 2. FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing a step-reducing member in a display device according to a second embodiment; FIG. 7 is an explanatory diagram for explaining suppression of damage to a transparent protection member in a display device according to a second embodiment. 4 is a diagram showing a first modified example of the display device of the second embodiment, and is a cross-sectional view corresponding to FIG. 3. FIG. 4 is a diagram showing a second modification of the display device of the second embodiment, and is a cross-sectional view corresponding to FIG. 3. FIG.

Embodiments of the present invention will be described below based on the drawings. Note that in each of the following embodiments, parts that are the same or equivalent to each other will be described with the same reference numerals.

(First embodiment)
The display device 1 of the first embodiment will be explained with reference to FIGS. 1 to 3. The display device 1 is preferably applied to, for example, an in-vehicle display device mounted on a vehicle such as an automobile, but it may also be mounted on a moving body other than a vehicle, and of course, it can also be applied to other uses. It can be done.

In FIG. 1, in order to make it easier to understand the arrangement of each component in the display device 1, the outlines of the display section 3 and the flange section 41 of the frame body 4 that are covered by the transparent protection member 2, which will be described later, are indicated by broken lines when viewed from the front. , and the outline of the step-reducing member 6 is indicated by a two-dot chain line.

For example, as shown in FIG. 1, the display device 1 of this embodiment includes a transparent protection member 2, a display section 3, and a frame 4, and a flange 41 provided inside the frame 4 has a transparent protection member 2. The member 2 is attached and the display section 3 is covered with the transparent protective member 2. For example, as shown in FIG. 2, the display device 1 includes a step-reducing member 6 attached to the opposite surface of the flange 41 of the frame 4 to the surface facing the transparent protection member 2, and a backlight attached to the step-reducing member 6. 7 and a housing 8 to which the frame 4 is attached.

The transparent protection member 2 is a protection member that is made of a translucent material such as glass having a hardness higher than a predetermined value, and protects the display section 3 . The transparent protection member 2 may also be called a cover glass when it is made of glass, but in order to be able to bend at a predetermined curvature when an external force is applied, for example, it is not limited. However, it is preferable that the thickness is 2 mm or less. The transparent protection member 2 has a rectangular plate shape, for example, and is attached to the flange 41 of the frame 4 via an elastic adhesive 5.

The display unit 3 is a display body that displays various images, and for example, in this embodiment, it is a liquid crystal panel that uses a backlight 7 as a light source and controls the orientation of liquid crystal molecules in each pixel using a thin film transistor (TFT). . The display section 3 is, for example, coated on the side of the transparent protection member 2 facing the flange 41 with an optical adhesive (not shown) such as OCA (abbreviation for Optical Clear Adhesive) or OCR (abbreviation for Optical Clear Resin). It is pasted. The display section 3 is arranged in a region inside the opening portion of the frame body 4, that is, in a region of the transparent protection member 2 that does not overlap with the flange portion 41 and the step-reducing portion 62 of the step-reducing member 6, which will be described later. The display unit 3 is connected to a liquid crystal control unit (not shown) for controlling the alignment of liquid crystal molecules via, for example, wiring (not shown), and displays various images based on external video signals using a backlight 7 as a light source. It has a displayable configuration.

Note that the liquid crystal panel and liquid crystal control unit (for example, an electronic control unit equipped with various electronic components such as a CPU and ROM) used as the display unit 3 are well known, and therefore detailed description thereof will be omitted in this specification. do. The display device 1 of this embodiment is a liquid crystal display (LCD).

For example, as shown in FIGS. 1 and 2, the frame 4 has a substantially bottomless rectangular cylindrical frame shape, and includes a flange 41 for attaching the transparent protection member 2 to the inner wall side. The frame body 4 is made of, for example, any resin material, and may also be referred to as an "escutcheon." The shape of the frame 4 can be changed as appropriate depending on the shape of the transparent protection member 2.

The flange portion 41 is a convex portion that protrudes from the inner wall surface of the frame body 4, and is provided at a predetermined position from the upper opening to a depth greater than the thickness of the transparent protection member 2, as shown in FIG. 2, for example. . For example, as shown in FIG. 3, the flange portion 41 has one surface 41a facing the transparent protection member 2, and the other surface 41b opposite thereto, and in this embodiment, a part of the one surface 41a on the tip side is transparent. The inclined portion 41aa is inclined so as to be spaced apart from the protection member 2. In other words, the flange 41 is configured such that, for example, a portion of the one surface 41a located at the tip of the flange 41 is the one-surface tip 411, and a part of the front end of the one surface 41a is the inclined portion 41aa. is the farthest position from the transparent protection member 2. The transparent protection member 2 is attached to the flange portion 41 via the elastic adhesive 5 in the remaining portion of the one surface 41a that is different from the inclined portion 41aa.

The elastic adhesive 5 is made of any adhesive and elastic resin material, and is used to attach the transparent protection member 2 and the step-reducing member 6 to the flange 41 of the frame 4. When the transparent protection member 2 is deformed by an external force, the elastic adhesive 5 holds the transparent protection member 2 on the frame 4 while elastically deforming following the deformation of the transparent protection member 2.

The step-reducing member 6 is a rigid component that is made of, for example, any resin material or metal material, or a combination of these materials, and is used to alleviate the step that occurs when the tip of the flange 41 is cut off. It is. Specifically, the step-reducing member 6 has a step-reducing portion 62 to be described below adjacent to the flange portion 41, so that when the transparent protection member 2 is deformed toward the flange portion 41, the flange portion of the transparent protection member 2 Excessive deformation of the portion near the tip 411 on one side of 41 is suppressed. In other words, the level difference reducing member 6 is a member for preventing damage to the transparent protection member 2.

The step-reducing member 6 is, for example, smaller than the frame 4 and has a substantially bottomless quadrangular cylindrical frame shape, and is attached to the other surface 41b of the flange 41 via the elastic adhesive 5. . In this embodiment, the step-reducing member 6 has a holding portion 61 that holds the backlight 7 that is the light source of the display portion 3, and has a tip end portion on one side in a portion located closer to the transparent protection member 2 than the holding portion 61. A step relief portion 62 is formed adjacent to the step 411. Note that the step-reducing member 6 may also be referred to as a "backlight bezel" in this embodiment.

The step relief portion 62 has a shape including an inclined surface 62a that forms a flat or curved surface that is continuous with a part of the surface 41a including the tip (in the present embodiment, the inclined portion 41aa). . Similar to the slope portion 41 aa, the step relief portion 62 is sloped such that the slope surface 62 a is gradually spaced apart from the transparent protection member 2 toward the inner center of the frame body 4 .

Note that "having continuity" as used herein means that there is no level difference between the tip end portion 411 of one surface and the end of the inclined surface 62a on the side of the tip end portion 411 of the one surface, or the level difference is less than a predetermined level, and This means that the inclined surface 62a substantially forms one plane or curved surface.

For example, the step-reducing portion 62 has a portion of the surface of the step-reducing member 6 that faces the other surface 41b of the flange 41 as the mounting surface 6a, and a height (thickness) relative to the mounting surface 6a that is equal to the tip of one surface of the flange 41. It is adjusted according to the thickness of 411. As a result, the step-reducing portion 62 is positioned with the front end portion 411 and the inclined surface 62a, so that these form a continuous surface.

The backlight 7 is a light source of the display section 3 which is a liquid crystal panel in this embodiment, and for example, any light source commonly used in the field of liquid crystal displays can be used. The backlight 7 is held by the step-reducing member 6 and connected to an external power source through wiring or the like (not shown).

The casing 8 is a member that is attached to an opening on the opposite side of the opening to which the transparent protection member 2 is attached in the frame 4 and covers the step-reducing member 6 . The housing 8 houses various electronic components such as a control section (not shown) of the display section 3, for example.

The above is the basic configuration of the display device 1 of this embodiment.

Next, suppression of damage to the transparent protection member 2 by the step-reducing member 6 will be described in comparison with a display device 100 of a comparative example that does not have the step-reducing member 6, with reference to FIGS. 4A to 5.

First, a comparative example display device 100 will be briefly described.

The display device 100 of the comparative example is a liquid crystal display device, and for example, as shown in FIG. It does not have a corresponding part. In this display device 100, when a force is applied to the transparent protection member 2 due to an external impact or the like, when the transparent protection member 2 comes into contact with the flange 41, a part of the tip of the flange 41 is an inclined portion 41aa, so that This structure prevents the transparent protection member 2 from being excessively deformed and damaged.

However, in the display device 100, although it is possible to suppress damage to the portion of the transparent protection member 2 that comes into contact with the inclined portion 41aa, it is not possible to prevent damage to the portion that comes into contact with the portion that is stepped by the front end portion 411. .

Specifically, for example, as shown in FIG. 4B, when the transparent protection member 2 is deformed so as to come into contact with the inclined portion 41aa of the collar portion 41, the portion of the transparent protection member 2 that comes into contact with the one-sided distal end portion 411 is as follows. It deforms to follow the step, and the curvature becomes large in some parts. At this time, the transparent protection member 2 may crack and be damaged due to the step caused by the front end portion 411.

In contrast, in the display device 1 of the present embodiment, as shown in FIG. 5, for example, the step-reducing member 6 is attached to the flange portion 41, and the inclined surface 62a of the step-reducing portion 62 is arranged adjacent to the inclined portion 41aa. It becomes. That is, in the display device 1, the sloped surface 62a is a flat or curved surface that is continuous with the distal end portion 411 on one side, so that the difference in level at the distal end of the flange portion 41 is alleviated. Therefore, even if the transparent protection member 2 is deformed toward the flange 41 due to an external force, the curvature does not deform more than a predetermined amount due to the step at the tip of the flange 41, and damage is suppressed. be done.

According to this embodiment, by attaching the step-reducing member 6 having the step-reducing portion 62 to the flange 41 of the frame 4, the step at the tip of the flange 41 is alleviated, and the transparent protection member 2 is This results in a display device 1 in which excessive deformation is suppressed. Therefore, damage due to deformation of the transparent protection member 2 attached to the flange portion 41 of the frame body 4 is suppressed, resulting in a display device with improved reliability than before.

(Second embodiment)
The display device 1 of the second embodiment will be described with reference to FIGS. 6 to 8. In FIG. 8, as in FIG. 5, the load acting on the transparent protection member 2 due to an external impact or the like is indicated by a white arrow.

In the display device 1 of this embodiment, the display unit 3 is configured with an OLED (abbreviation for Organic Light Emitting Diode) panel, does not include a backlight 7, and the step reduction member 6 covers the entire back surface of the display unit 3. This embodiment differs from the first embodiment described above in that it has a configuration. In this embodiment, this difference will be mainly explained.

In the present embodiment, the display unit 3 has individual pixels configured by self-luminous elements such as OLEDs, and the light emission of each pixel is controlled by TFT, so that the display surface, which is the surface facing the transparent protection member 2, It is a self-luminous panel that displays various images. The display section 3 is constituted by, for example, an OLED panel in which an OLED and a TFT for controlling the drive thereof are formed on a flexible resin substrate, and is connected to a drive control section (not shown) that controls the drive of the TFT. Note that flexible OLED panels and their drive control units (e.g., electronic control units in which various electronic components such as a CPU and ROM are mounted on a circuit board) are well known, so detailed explanations thereof will not be provided in this specification. omitted. The display device 1 of this embodiment is an OLED display device.

In this embodiment, for example, as shown in FIG. 6, the level difference reducing member 6 is attached to the flange portion 41, does not have the holding portion 61, and is attached to the side of the display portion 3 opposite to the display surface. It has a plate shape that covers the entire back surface. This is an OLED panel in which the display section 3 is made up of self-luminous elements, and the backlight 7 is no longer necessary, and the holding section 61 is no longer necessary, but it is necessary to compensate for the rigidity that the backlight 7 had. This is because there is. Therefore, in this embodiment, the step-reducing member 6 is preferably made of a metal material such as aluminum or magnesium, from the viewpoint of ensuring rigidity.

The level difference reducing member 6 is, for example, a surface facing the back surface of the display section 3, and has a portion located directly below the upper surface 6b, and the upper surface 6b is a flat surface. Similar to the first embodiment, the step-reducing member 6 is arranged in a portion adjacent to the tip end portion 411 on one side of the collar portion 41, and includes a step-relaxing portion 62 having an inclined surface 62a that is continuous with the tip end portion 411 on one side. I have it. For example, as shown in FIG. 7, the step-reducing member 6 has a shape in which an upper surface 6b and an inclined surface 62a intersect linearly in a cross-sectional view, but the shape is not limited thereto. For example, the step-reducing member 6 may have a shape in which a portion of the inclined surface 62a on the upper surface 6b side is a curved surface, and the intersection of the upper surface 6b and the inclined surface 62a is not an angle. Even in any of the above cases, as shown in FIG. 8, for example, no step is formed at the end portion of the front end portion 411 and the inclined surface 62a on the opposite side from the front end portion 411, and the transparent protective member 2 Even if it is deformed by an external force, excessive deformation due to the step is suppressed. As a result, stress concentration is suppressed at the portion of the transparent protection member 2 in contact with the front end portion 411 and in the portion in contact with the end of the inclined surface 62a, and the display device 1 is able to prevent damage to the transparent protection member 2. This is a configuration that is unlikely to occur.

In addition, in the case where the intersection between the upper surface 6b and the inclined surface 62a does not form an angle, the radius of curvature of the part of the transparent protection member 2 that comes into contact with the intersection becomes smaller, so that the transparent protection member 6 This is preferable from the viewpoint of damage prevention described in No. 2.

According to this embodiment, in addition to alleviating the step at the tip of the flange 41, there is no step at the end of the inclined surface 62a of the step alleviating member 6, so that when the transparent protection member 2 is deformed by an external load, etc. The display device 1 has a small radius of curvature. Therefore, in the display device 1 of this embodiment, the effect of suppressing damage to the transparent protection member 2 can be obtained to a degree equal to or greater than that of the first embodiment.

(Modified example of second embodiment)
A modification of the display device 1 of the second embodiment will be described with reference to FIGS. 9 and 10.

For example, as shown in FIG. 9, the display device 1 may have a configuration in which the entire surface 41a of the flange portion 41 is a substantially flat surface and does not have the inclined portion 41aa. In this case, the step-reducing member 6 has, for example, a height of the step-reducing portion 62 and the upper surface 6b relative to the mounting surface 6a facing the other surface 41b of the flange portion 41, and the height of the display portion 3 is greater than in the second embodiment. The distance between the upper surface 6b and the upper surface 6b is short.

Also in this modification, as in the second embodiment, when the transparent protection member 2 is deformed, excessive deformation of the transparent protection member 2 due to the step caused by the front end portion 411 of the flange portion 41 is suppressed, and the transparent protection member 2 is This results in a display device 1 in which damage to the protection member 2 is suppressed. Furthermore, since the flange portion 41 does not have the inclined portion 41aa, the adhesive area between the transparent protection member 2 and the flange portion 41 via the elastic adhesive 5 becomes large, and the transparent protection member 2 falls off from the frame 4. It can also have the effect of suppressing this.

Further, the display device 1 may have a configuration in which a buffer member 9 is disposed between the display section 3 and the step-reducing member 6, as shown in FIG. 10, for example.
Thereby, the deformation of the transparent protection member 2 can be further suppressed by the buffer member 9, and the reliability of the transparent protection member 2 is further improved. The buffer member 9 is made of, for example, an arbitrary resin material, and is configured to be able to follow the deformation of the transparent protection member 2 when the transparent protection member 2 deforms. When a heat dissipating gel or the like with high thermal conductivity is selected as the buffer member 9, the heat dissipation of the display unit 3 is improved by diffusing the heat of the display unit 3 to the step-reducing member 6 via the buffer member 9. The effect of improving the reliability of the transparent protection member 2 and the display section 3 can be obtained.

Note that, as the heat dissipation gel, for example, any gel made of a resin material containing a filler made of a metal material with high thermal conductivity and commonly used in the field of electronic components and the like can be used.

This modification also provides the same effects as the second embodiment. Furthermore, when the buffer member 9 is used, the deformation of the transparent protection member 2 can be further suppressed, and when a heat dissipating gel or the like with high thermal conductivity is used as the buffer member 9, the heat dissipation of the display section 3 is improved, and the transparent The reliability of the protection member 2 and the display section 3 is further improved.

(Other embodiments)
Although the present invention has been described based on examples, it is understood that the present invention is not limited to the examples or structures. The present invention also includes various modifications and equivalent modifications. In addition, various combinations and configurations, as well as other combinations and configurations that include only one, more, or less of these elements, fall within the scope and spirit of the present invention.

(1) For example, in the above embodiment, an example was described in which the display unit 3 is a display panel such as a liquid crystal panel or an OLED panel; however, the display unit 3 is not limited to these, and may be a panel using micro LEDs, etc. Other panels may be used as the display section 3. The step-reducing member 6 may have the same configuration as the second embodiment described above if the display section 3 is a panel using micro-LEDs, for example, but it may have a structure as long as it has the step-reducing portion 62, and its shape may be changed. etc. may be changed as appropriate depending on the configuration of the display section 3.

(2) As in the second embodiment, even when the display section 3 is a panel composed of self-luminous elements and the flange section 41 includes the inclined section 41aa, the distance between the display section 3 and the step-reducing member 6 is A buffer member 9 may be arranged between the upper surface 6b and the upper surface 6b. This also applies to the case where the display section 3 is configured with a panel made of self-luminous elements other than an OLED panel as described above.

Moreover, although the heat dissipation gel was described above as an example of the buffer member 9 disposed between the display section 3 and the step reduction member 6, the buffer member 9 does not necessarily have to be gel-like and may contain a heat dissipation filler. It may also be a heat dissipation sheet made of an elastic member.

2... Transparent protective member, 3... Display section, 4... Frame body, 41... Flange section,
41a...one side, 41aa...slanted part, 41b...other side,
411... One side tip, 5... Elastic adhesive, 6... Step-difference reducing member,
61... Step relief part, 62a... Inclined surface, 7... Backlight, 9... Buffer member

Claims (7)

a display section (3) that displays various images;
a transparent protection member (2) that covers the display section;
a frame (4) having a flange (41) to which a part of the end side of the transparent protection member is attached;
A surface of the flange facing the transparent protection member is defined as one surface (41a), a portion of the one surface located at the tip of the flange is defined as a one-sided tip (411), and a position adjacent to the one-sided tip is defined as a one-sided tip (411). a step-reducing member (6) having a step-reducing portion (62) having an inclined surface (62a) that is arranged and inclined away from the transparent protection member;
In the display device, the inclined surface forms a plane or a curved surface that is continuous with the tip of the one surface. The display device according to claim 1, wherein the transparent protection member is made of glass, and a portion of the end portion is attached to the flange via an elastic adhesive (5). The display device according to claim 2, wherein the transparent protection member has a thickness of 2 mm or less. The display section is a display panel using a self-luminous element,
4. The display device according to claim 2, wherein the step-reducing member covers the entire rear surface of the display portion on the opposite side to the display surface facing the transparent protection member. The display device according to claim 4, wherein a part of the region of the flange including the tip of the one surface is an inclined portion (41aa) that is inclined so as to be further away from the transparent protection member than the rest of the one surface. . The step relief member is made of a metal material,
The display device according to claim 4 or 5, wherein a buffer member (9) is disposed between the display section and the step relief member. The display section is a liquid crystal panel,
The one-sided distal end portion is a sloped portion (41aa) that slopes away from the transparent protection member,
The display device according to claim 2 or 3, wherein the step reduction member is a bezel that holds a backlight (7) that is a light source of the display section.

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