Display device

Abstract

To provide a display device capable of maintaining good anti-fogging performance over a long period.SOLUTION: Provided is a display device 1 comprising: a display panel 5; an upper case 2 covering the display panel 5; a glass unit 22 provided to the upper case 2 and facing the display panel 5 via a display unit internal air space S1; and a packing 6 provided between the upper case 2 and the display panel 5 so as to surround the visible region of the display panel 5 and partitioning between the display unit internal air space S1 and a non-display unit internal air space S2. A packing contact unit 23 of the upper case 2 includes an inside rib 231 surrounding the display unit internal air space S1 and an outside rib 232 juxtaposed on the outer circumference side of the inside rib 231 with a space therebetween. The inside rib 231 and the outside rib 232 are discontinuous ribs having a notch 231a, 232a, and an internal air mixing space 233 is formed between the inside rib 231 and the outside rib 232, in which the display unit internal air and the non-display unit internal air are mixed.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] There is known a technique for surrounding an air space inside the display unit between the display panel and the case (glass unit) with string-like packing to prevent fogging of the glass unit (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-63999 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, while the above-mentioned conventional technologies can prevent highly humid air from flowing into the air space inside the display unit, once highly humid air flows into the air space inside the display unit, it becomes difficult for moisture to escape from the air space inside the display unit, making it difficult to maintain good anti-fogging performance over a long period of time.

[0005] Therefore, an object of the present disclosure is to provide a display device that can maintain good anti-fogging performance for a long period of time. [Means for solving the problem]

[0006] On one side, A display panel; a case covering the display panel; a glass portion provided in the case and facing the display panel with an air space in between; a packing provided between the case and the display panel so as to surround a visible area of ​​the display panel, the packing separating an air space inside the display section from an air space inside the non-display section, the case includes a packing contact portion that protrudes from an inner surface of the case toward the display panel and contacts the packing; The packing abutment portion is an inner rib surrounding the display unit internal air space; and an outer rib arranged in parallel with the inner rib at intervals on the outer circumferential side of the inner rib, the inner rib and the outer rib are interrupted ribs having a notch, A display device is provided in which an internal air mixing space is formed between the inner rib and the outer rib, which mixes the internal air of the display area flowing in through the cutout portion of the inner rib and the internal air of the non-display area flowing in through the cutout portion of the outer rib. Effect of the Invention

[0007] According to the present disclosure, it is possible to maintain good anti-fogging performance for a long period of time. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a display device according to an embodiment; [Diagram 2] FIG. 2 is a cross-sectional view of a main part of the display device. [Diagram 3] 3A and 3B are a perspective view and an enlarged view of the main part of the inside of the upper case, respectively. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] 4A and 4B are diagrams illustrating an internal air mixing action in an internal air mixing space. [Figure 7] FIG. 11 is a diagram showing the temperature tracking effect of the inside air mixing space. [Figure 8] 11A and 11B are diagrams illustrating the function of a partition portion. [Figure 9] FIG. 13 is a diagram showing the function of a thin portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Each embodiment will be described in detail below with reference to the accompanying drawings.

[0010] Fig. 1 is a perspective view showing a display device 1 according to an embodiment, and Fig. 2 is a cross-sectional view of a main part of the display device 1. Fig. 1 shows a coordinate system of three orthogonal axes (X, Y, Z). In the following, for convenience, the positive side of the Z direction is defined as the upper side, and the negative side of the Z direction is defined as the lower side.

[0011] The display device 1 is for, for example, a motorcycle, and functions as a meter (instrument) that displays, for example, the traveling speed, etc. The display device 1 includes an upper case 2 and a lower case 3, as shown in FIG.

[0012] The upper case 2 functions as an upper housing part of the display device 1. The upper case 2 is formed of, for example, resin etc. The upper case 2 is connected to the lower case 3 by fitting or the like.

[0013] An opening 21 extending in the XY plane is formed in the upper part of the upper case 2. A glass portion 22 is provided in the opening 21. The glass portion 22 is a transparent member and may be formed of, for example, a lens. The glass portion 22 in this embodiment is formed integrally with the upper case 2 by insert molding, but the glass portion 22 may be fitted into the opening 21 of the resin-molded upper case 2 in a later process.

[0014] The lower case 3 functions as a lower housing of the display device 1. The lower case 3 is formed of, for example, resin. The lower case 3 cooperates with the upper case 2 to form a space therein, and a display assembly A, which will be described later, is housed in the space.

[0015] The display assembly A includes an inner case 4, a display panel 5, and a substrate (not shown).

[0016] The middle case 4 is made of, for example, resin etc. The middle case 4 supports the display panel 5 and the substrate. The middle case 4 is fixed to the lower case 3 by fasteners such as screws (not shown).

[0017] The display panel 5 is formed of, for example, an LCD (liquid crystal display). The display panel 5 extends within the XY plane. The visible area of ​​the display panel 5 faces the glass part 22 via the display unit internal air space S1. This allows the display content of the display panel 5 to be viewed from outside the display device 1 through the glass part 22.

[0018] The board has mounted thereon electronic components for controlling the display panel 5 etc., a power supply etc. The board is fixed to the inner case 4 by fasteners such as screws (not shown).

[0019] 2, the display device 1 also includes a packing 6 provided on the outer periphery of the display panel 5. The packing 6 is provided so as to surround the visible area of ​​the display panel 5 when viewed in the vertical direction. The packing 6 is made of sponge or synthetic rubber, and has a generally continuous frame shape. The packing 6 extends within the XY plane.

[0020] The packing 6 is provided between the upper case 2 and the display panel 5 in the vertical direction, and surrounds the display unit internal air space S1. In other words, the packing 6 separates the display unit internal air space S1 from the non-display unit internal air space S2 other than the display unit internal air space S1. As a result, the packing 6 functions as a sealing member that suppresses the inflow of humid air from the non-display unit internal air space S2 to the display unit internal air space S1, and prevents fogging of the glass portion 22. The packing 6 also functions as a vibration-proof member or a cushioning member that suppresses movement of the display panel 5 when the display device 1 is vibrated or receives an impact.

[0021] 3 is a perspective view showing the inside of the upper case 2 and an enlarged view of a main portion thereof, FIG. 4 is a view showing the inside of the upper case 2, and FIG. 5 is an enlarged view of the packing contact portion 23. As shown in FIG.

[0022] 2 to 5, the case 2 has a packing abutment portion 23 that protrudes from the inner surface of the case 2 toward the display panel 5 and abuts against the packing 6. The packing abutment portion 23 is formed along the entire circumferential direction inside the peripheral edge of the opening 21. In this embodiment, the packing 6 is attached to the tip of the packing abutment portion 23, and when the upper case 2 and the lower case 3 are connected, the packing 6 is brought into contact with the display panel 5 in a compressed state, but the packing 6 may also be attached to the display panel 5 side.

[0023] The packing abutment portion 23 includes an inner rib 231 surrounding the display unit internal air space S1, and an outer rib 232 arranged in parallel with the inner rib 231 at an interval on the outer periphery side of the inner rib 231. The inner rib 231 and the outer rib 232 are interrupted ribs (intermittent ribs) having notches 231a, 232a. The length, formation interval, and number of the notches 231a, 232a in the length direction of the packing abutment portion 23 can be appropriately changed depending on the usage environment of the display device 1, etc. For example, in this embodiment, the length and formation interval (rib length) of the notches 231a, 232a in the length direction of the packing abutment portion 23 are approximately the same as each other, but the length and formation interval of the notches 231a, 232a do not have to be the same as each other.

[0024] An internal air mixing space 233 is formed between the inner rib 231 and the outer rib 232. The internal air mixing space 233 mixes the display section internal air (the internal air of the display section internal air space S1) flowing in from the notch 231a of the inner rib 231 and the non-display section internal air (the internal air of the non-display section internal air space S2) flowing in from the notch 232a of the outer rib 232. The internal air mixing space 233 has a top surface 233a that is close to the inner surface of the glass section 22. The function of the internal air mixing space 233 will be described later.

[0025] The notch portion 231a of the inner rib 231 and the notch portion 232a of the outer rib 232 are formed to be shifted from each other in the length direction of the packing abutment portion 23. In other words, in the width direction of the packing abutment portion 23, the notch portion 231a of the inner rib 231 faces the non-notch portion of the outer rib 232, and the notch portion 232a of the outer rib 232 faces the non-notch portion of the inner rib 231. This allows the internal air flowing into the internal air mixing space 233 from the notches 231a and 232a to be guided in the length direction of the internal air mixing space 233, thereby enabling efficient mixing of the internal air.

[0026] The packing abutment portion 23 further includes a plurality of partition portions 234 that divide the internal air mixing space 233 into a plurality of spaces in the length direction of the packing abutment portion 23. For example, in the packing abutment portion 23 of this embodiment, the partition portions 234 are provided at the four corners and the middle portions of the four sides, and the internal air mixing space 233 is divided into eight spaces by these partition portions 234. The formation positions and the number of the partition portions 234 can be appropriately changed depending on the usage environment of the display device 1, etc. The function of the partition portions 234 will be described later.

[0027] Upper case 2 further includes thin portion 24, which is thinner than glass portion 22, on the outer periphery of glass portion 22. A preferred position for forming thin portion 24 is a position where the outer surface side of thin portion 24 is along the XY plane like glass portion 22, and the inner surface side of thin portion 24 contacts non-display portion internal air space S2 near packing abutment portion 23. The function of thin portion 24 will be described later.

[0028] Next, the anti-fogging function of the display device 1 will be described with reference to FIGS.

[0029] FIG. 6 is a diagram showing the internal air mixing action of the internal air mixing space 233. As shown in FIG.

[0030] In the display device 1 of this embodiment, the display unit interior air space S1 and the non-display unit interior air space S2 are communicated with each other via the cutouts 231a, 232a of the packing abutment portion 23 and the interior air mixing space 233. As a result, even if high humidity interior air flows into the display unit interior air space S1 due to being left in a high temperature and high humidity environment for a long period of time, if the humidity of the non-display unit interior air space S2 decreases, the humidity of the display unit interior air space S1 also decreases accordingly, so that fogging of the glass portion 22 can be suppressed.

[0031] On the other hand, when the temperature difference between the air inside the display section and the air inside the non-display section is large, the air inside the non-display section may flow into the air inside space S1 of the display section through the notches 231a, 232a of the packing abutment section 23, possibly fogging the glass section 22. In such a situation, as shown in Fig. 6, the air inside the non-display section is mixed with the air inside the display section in the air mixing space 233 and flows into the air inside space S1 of the display section with a reduced temperature difference, thereby suppressing fogging of the glass section 22.

[0032] In addition, in the width direction of the packing abutment portion 23, the notched portion 231a of the inner rib 231 faces the non-notched portion of the outer rib 232, and the notched portion 232a of the outer rib 232 faces the non-notched portion of the inner rib 231. This allows the internal air flowing into the internal air mixing space 233 from the notched portions 231a and 232a to be guided in the length direction of the internal air mixing space 233, promoting mixing of the internal air and efficiently reducing the temperature difference.

[0033] FIG. 7 is a diagram showing the temperature following action of the inside air mixing space 233. As shown in FIG.

[0034] 7, when the glass portion 22 is cooled by rain or water W from a car wash, warm air inside the non-display portion may flow into the display portion interior air space S1 and fog the glass portion 22. In such a case, the top surface 233a of the interior air mixing space 233 adjacent to the glass portion 22 is also cooled in the same way as the glass portion 22, so that the air inside the non-display portion is mixed with the air inside the display portion while being cooled by the top surface 233a in the interior air mixing space 233. This further reduces the temperature difference between the air inside the non-display portion and the air inside the display portion, and improves the anti-fogging performance of the glass portion 22.

[0035] FIG. 8 is a diagram showing the function of the partition portion 234. As shown in FIG.

[0036] In the display unit interior air space S1, ventilation is performed by the inflow and outflow of interior air due to the temperature difference between the display unit interior air and the non-display unit interior air, etc. From the viewpoint of preventing fogging of the glass part 22, there are situations in which it is desirable to efficiently ventilate the display unit interior air space S1. For example, in a situation where the display device 1 is exposed to sunlight, the glass part 22 itself, which is a transparent material, generates little heat, but the display panel 5 generates a large amount of heat. In such a situation, the temperature of the display unit interior air space S1 becomes higher than the temperature of the glass part 22, and the glass part 22 is likely to fog up. Therefore, in such a situation, efficient ventilation and reducing the temperature difference between the glass part 22 and the display unit interior air space S1 are effective in preventing fogging.

[0037] The movement of the inside air shown in Fig. 8 is mainly due to a temperature rise in the display unit inside air space S1 caused by irradiation with external light (sunlight). As shown in this figure, in this embodiment, the inside air mixing space 233 is partitioned into a plurality of spaces by the partitions 234 in the length direction of the packing abutment portion 23, so that the role of inflow / exhaust is clearly divided for each partitioned inside air mixing space 233, and the ventilation efficiency of the display unit inside air space S1 can be improved. In addition, by shortening the inside air mixing space 233, it is possible to prevent the inside air from being heated cumulatively when it flows (for example, when it flows circulatingly) in the inside air mixing space 233, and suppress the temperature rise of the inside air.

[0038] FIG. 9 is a diagram showing the function of the thin portion 24. As shown in FIG.

[0039] 9, when the glass portion 22 is cooled by rain or water W from a car wash, warm air inside the non-display portion may flow into the display portion interior air space S1, causing the glass portion 22 to fog up. In such a case, the thin portion 24 on the outer periphery of the glass portion 22 is cooled before the glass portion 22, and therefore condensation occurs before the glass portion 22. This reduces the humidity of the air inside the non-display portion, and accordingly the humidity of the air inside the display portion that is in communication with the air inside the non-display portion also decreases, making it possible to suppress fogging of the glass portion 22.

[0040] Although each embodiment has been described above in detail, the present invention is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the claims. In addition, it is also possible to combine all or a plurality of the components of the above-described embodiments. [Explanation of symbols]

[0041] 1 Display device 2 Upper case (case) 21 Opening 22 Glass Department 23 Packing contact part 231 Inner rib 231a Notch 232 Outer Rib 232a Cutout 233 Internal air mixing space 233a Top 234 Partition 24 Thin section 3 Lower case 4. Medium Case 5 Display Panel 6. Packing A Display Assembly S1 Display unit internal air space S2 Non-display interior air space

Claims

1. A display panel; a case covering the display panel; a glass portion provided in the case and facing the display panel with an air space in between; a packing provided between the case and the display panel so as to surround a visible area of ​​the display panel, the packing separating an air space inside the display section from an air space inside the non-display section, the case includes a packing contact portion that protrudes from an inner surface of the case toward the display panel and contacts the packing; The packing abutment portion is an inner rib surrounding the display unit internal air space; and an outer rib arranged in parallel with the inner rib at intervals on the outer circumferential side of the inner rib, the inner rib and the outer rib are interrupted ribs having a notch, A display device in which an internal air mixing space is formed between the inner rib and the outer rib, which mixes the internal air of the display section flowing in through the cutout portion of the inner rib and the internal air of the non-display section flowing in through the cutout portion of the outer rib.

2. The display device according to claim 1 , wherein the notch portion of the inner rib and the notch portion of the outer rib are formed to be offset from each other in the longitudinal direction of the packing contact portion.

3. The display device according to claim 1 , wherein the packing contact portion further includes a partition portion that divides the inside air mixing space into a plurality of spaces in a length direction of the packing contact portion.

4. The display device according to claim 1 , wherein the case further comprises a thin portion on an outer periphery of the glass portion that is thinner than the glass portion.

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