JP5565261B2 - In-vehicle display device - Google Patents

Description

  The present invention relates to an on-vehicle display device, and more particularly to an on-vehicle display device of a type in which a sealing material is installed between a liquid crystal display panel and a protective panel.

As an in-vehicle display device, a liquid crystal display panel, a protective panel arranged with a predetermined space with respect to the panel surface to protect the panel surface of the liquid crystal display panel, and a case for holding the liquid crystal display panel and the protective panel And a sealing material disposed in a state of being elastically compressed between the panel surface of the liquid crystal display panel and the protective panel or case. In addition to the liquid crystal display panel and protective panel, various resin parts such as operation switches for changing the settings of various modes displayed on the liquid crystal display panel are assembled in the case. In many cases, resin parts are left behind, or a part of the resin parts are peeled off during use to generate new dust. The seal material is elastically compressed by the liquid crystal display panel and the protection panel to prevent foreign matter such as residues and dust from entering the space between the liquid crystal display panel and the protection panel. In general, the liquid crystal display panel is disposed so as to surround the entire periphery of the panel surface.
However, if the sealing material is elastically compressed and arranged so as to surround the entire circumference of the panel surface of the liquid crystal display panel, the space between the two panels is sealed, so the temperature change between the inside and outside of the display device Therefore, there has been a problem that condensation occurs on the inner peripheral surface of the protective panel when the air in the space (usually containing water vapor) is cooled to be below the dew point. In order to cope with this problem, in the liquid crystal display device described in Patent Document 1 below, the sealing material is divided into a plurality of portions so that a gap is formed between the sealing materials, and the gap functions as a vent. Is configured to do.
Moreover, in the liquid crystal display device described in Patent Document 2 below, a porous sealing material is used so that the hole functions as a vent.

JP 2008-89857 A JP 2005-309268 A

  However, in the liquid crystal display device described in Patent Document 1, since the sealing material is discontinuous, when the sealing material is attached to the protective panel or the case, the handling property (handling property) of the sealing material is likely to be deteriorated and assembled. There was a problem of causing an increase in man-hours. Further, in the liquid crystal display device described in Patent Document 2, when the sealing material is elastically compressed, the hole may be crushed depending on the hardness of the sealing material, so it is necessary to select a sealing material having a certain degree of hardness. There is a problem that the degree of freedom of selection of the sealing material is lowered.

  The present invention has been made to cope with the above-described problems, and an object thereof is to provide an in-vehicle display device provided with a sealant that is easy to handle during installation while preventing dust and condensation. It is in.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, the present invention provides a liquid crystal display panel, a protection panel disposed at a predetermined space with respect to the panel surface to protect the panel surface of the liquid crystal display panel, a liquid crystal display panel, and In a vehicle-mounted display device comprising a case that holds a protective panel, and a sealing material that is elastically compressed between the panel surface of the liquid crystal display panel and the protective panel or the case, the sealing material is while an inner frame portion disposed on the periphery inside the panel surface, and an outer frame portion disposed outwardly from the edge portion of the panel surface, Ru is formed into linked cyclic such that the outer frame portion is a single monolithic A portion of the inner frame portion is recessed, and a space is formed between the inner peripheral surface of the outer frame portion corresponding to the recessed portion of the inner frame portion and the peripheral end surface of the panel surface, and the panel surface of the liquid crystal display panel. Is connected to the space formed on the opposite side Wherein the communication port to is formed.

  In the in-vehicle display device of the present invention, the sealing material has an inner frame portion disposed on the inner periphery of the panel surface and an outer frame portion disposed on the outer periphery of the panel surface, and the outer frame portion and the panel surface. Between the two, a communication port is formed which communicates the space formed between the two panels with the space formed on the side opposite to the panel surface of the liquid crystal display panel. For this reason, dust prevention and dew condensation prevention can be aimed at satisfactorily. Moreover, the sealing material is formed in the cyclic | annular form connected so that an inner side frame part and an outer side frame part might be connected. For this reason, the handleability at the time of attachment of a sealing material can also be improved.

In this case, the outer frame portion is formed in a convex shape that bypasses and connects the recessed portion of the inner frame portion in a bent shape, and a communication port is formed between the inner peripheral surface of the convex portion and the peripheral end surface of the panel surface. There may be configured that will be formed.

  According to this, by the simple change of the shape of the sealing material, it is possible to obtain the effects of dust prevention, condensation prevention and ease of handling of the sealing material.

  In addition, the sealing material has a rectangular frame shape, the inner dimensions of the facing inner frame parts are set so that the width of the outer frame part is increased by the amount of shortening the width of the inner frame part, and the inner side A notch part may be formed from the inner peripheral side of the frame part to the outer frame part, and a communication port may be formed between the notch part and the panel surface. In this case, the cutout portion may be formed in, for example, a rectangular concave shape, or may be formed in a wedge-shaped concave shape that gradually tapers from the inner peripheral side of the inner frame portion to the outer frame portion. Or you may form in a circular concave shape in the inner corner part of an inner side frame part.

  If the inner dimensions of the corresponding inner frame parts are set so that the width of the outer frame part is increased by the width of the inner frame part, the overall length of the sealing material is increased, but the outer frame part is projected. Compared to the shape, it is possible to reduce the protruding space of the outer frame portion to the outside of the panel surface. For this reason, it is suitable for a vehicle-mounted display device in which the space between the liquid crystal display panel and the case has no margin.

  The sealing material has a rectangular frame shape, the width of at least one side is set so that the width of the outer frame is equal to or greater than the set length, and the sealing material is cut from the inner peripheral side of the inner frame to the outer frame. A notch can be formed, and a communication port can be formed between the notch and the panel surface.

  According to this, only the width length of an outer side frame part can be lengthened, without shortening the width length of an inner side frame part. For this reason, the dust-proof effect by an inner side frame part can fully be ensured.

  In addition, the sealing material has a trapezoidal frame shape, and the frame corresponding to the oblique side is configured as a protruding frame portion protruding outside the panel surface, and a communication port is formed between the inner peripheral surface of the protruding frame portion and the panel surface. It can also be set as a structure.

  In some cases, the inner wall of the case that holds the liquid crystal display panel and the protection panel has an inclined surface that intersects on an extension line of one side of the panel surface, for example. Therefore, in such an in-vehicle display device, the sealing material is formed in a trapezoidal frame shape, and the sealing material is arranged so that the frame corresponding to the oblique side is along the inner wall of the case. The effect that the position alignment becomes easy is obtained.

The front view of the vehicle air-conditioning panel which comprises the vehicle-mounted display apparatus which concerns on this invention. AA sectional drawing of FIG. The front view which concerns on Example 1 of this invention and shows the arrangement | positioning relationship between the panel surface of the liquid crystal display panel shown in FIG. 2, and dust-proof packing. BB sectional drawing of FIG. (A)-(c) concerns on Example 2 of this invention, and is a front view equivalent to FIG. (D) is related with Example 3 of this invention, and is a front view equivalent to FIG. (E) is related with Example 4 of this invention, and is a front view equivalent to FIG. FIGS. 5A to 5E are front views corresponding to FIGS. 5A to 5E according to a modification of the present invention. FIG. 4F is a front view corresponding to FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a front view of a vehicle air-conditioning panel 1 constituting an in-vehicle display device according to the present invention. The vehicle air-conditioning panel 1 is for operating a vehicle air-conditioning device (not shown) as an in-vehicle device, and is fitted in the instrument panel part IP.

  As shown in FIG. 2, the vehicle air-conditioning panel 1 is provided with a liquid crystal display panel 11 and a protection that is arranged with a predetermined space S <b> 1 separated from the panel surface 11 a in order to protect the panel surface 11 a of the liquid crystal display panel 11. Dustproof as a sealing material disposed in a state of being elastically compressed between the panel 12, the case 13 holding the liquid crystal display panel 11 and the protective panel 12, and the panel surface 11a of the liquid crystal display panel 11 and the case 13 Packing 14 is provided.

  The liquid crystal display panel 11 is mounted on the circuit board 16 via a pedestal 15. The circuit board 16 is fixed to the case 13. A space S2 that is sufficiently wider than the space S1 formed between the panels 11 and 12 is formed behind the liquid crystal display panel 11, that is, on the side opposite to the panel surface 11a of the liquid crystal display panel 11.

  The protective panel 12 is formed of, for example, a transparent acrylic resin or the like, and is attached to the case 13 so as to be substantially flush with the outer peripheral surface of the case 13 in front of the panel surface 11a of the liquid crystal display panel 11. The case 13 is formed of, for example, ABS resin, and accommodates various components such as the liquid crystal display panel 11 by being divided into respective accommodation spaces partitioned by a partition wall 13a.

  The dust-proof packing 14 is formed of, for example, urethane, rubber or the like, and as shown in FIGS. 3 and 4, the inner frame portion 14a disposed on the inner periphery of the panel surface 11a of the liquid crystal display panel 11 and the periphery of the panel surface 11a. And an outer frame portion 14b disposed on the outer side. The inner frame portion 14a and the outer frame portion 14b are connected so as to be connected and formed in a substantially rectangular ring shape, and the outer frame portion 14b corresponding to the lower side in FIG. It is formed in a convex shape that bypasses and connects in a bent shape.

  The dust-proof packing 14 is fixed to the inner wall surface of the case 13 via an adhesive on the front surface (front surface) of the inner frame portion 14a and the outer frame portion 14b, and the adhesive is applied to the rear surface (back surface) of the inner frame portion 14a. And is fixed to the panel surface 11 a of the liquid crystal display panel 11. Depending on the specifications of the case 13, the protective panel 12 may be attached to the inside of the case 13. In this case, the dust-proof packing 14 is placed on the front surface of the inner frame portion 14a and the outer frame portion 14b via an adhesive. The protective panel 12 is fixed to the rear surface.

  By forming the outer frame portion 14b in a convex shape, a space S1 formed between the panels 11 and 12 is displayed between the inner peripheral surface of the outer frame portion 14b and the peripheral end surface of the panel surface 11a in a liquid crystal display. A communication port S3 that communicates with a space S2 formed on the opposite side of the panel 11 from the panel surface 11a is formed.

  As is clear from the above description, in Example 1, the dust-proof packing 14 has an inner frame portion 14a and a convex outer frame portion 14b, and the convex outer frame portion 14b and the panel surface 11a. Between the two, a communication port S3 is formed which communicates the space S1 formed between the panels 11 and 12 with the space S2 formed behind the liquid crystal display panel 11. By providing such an inner frame portion 14a, for example, as shown by an arrow in FIG. 2, a dustproof effect is prevented that prevents foreign matters such as dust from entering the space S1 beyond the partition wall 13a. Further, the provision of the communication port S3 exhibits the effect of preventing condensation.

  Moreover, the dustproof packing 14 is formed in an annular shape that is connected so as to be connected to each other, so that the handleability at the time of fixing to the case 13 can be improved. In particular, in the first embodiment, the outer frame portion 14b is formed in a convex shape that bypasses and connects the inner frame portion 14a, so that the dustproof and dew condensation described above can be achieved by simply changing the shape of the dustproof packing 14. All effects of prevention and easy handling of the dustproof packing 14 can be obtained.

  In the said Example 1, although comprised so that the outer side frame part 14b of the dust-proof packing 14 might become convex shape with respect to the inner side frame part 14a, it is not restricted to this, For example, it shows to Fig.5 (a)-5 (c) You may comprise as dust-proof packing 14A, 14B, 14C of such a shape. Each of the dustproof packings 14A to 14C has a rectangular frame shape, and a cutout portion 14c is formed from the inner peripheral side of the inner frame portion 14a to the outer frame portion 14b. The inner peripheral surface of the cutout portion 14c and the panel surface 11a A communication port S3 is formed between the peripheral end surface.

  In this case, as shown in FIG. 5 (a), the notch portion 14c may be formed in a rectangular concave shape at the intermediate portion of the inner frame portion 14a, or as shown in FIG. 5 (b). You may form in the wedge-shaped concave shape which tapers gradually as it progresses to the outer side frame part 14b from the inner peripheral side of the inner side frame part 14a in the intermediate part of the frame part 14a. Alternatively, as shown in FIG. 5 (c), a round concave shape may be formed at the inner corner of the inner frame portion 14a.

  According to the second embodiment, compared with the first embodiment, it is possible to reduce the protruding space of the outer frame portion 14b to the outside of the panel surface 11a, so that the space between the liquid crystal display panel 11 and the case 13 is reduced. It is suitable for the vehicle air-conditioning panel 1 having no space.

  Moreover, you may comprise as dust-proof packing 14D of a shape as shown, for example in FIG.5 (d). The dust-proof packing 14D has a rectangular frame shape like the dust-proof packings 14A to 14C of the second embodiment, and only the width of the outer frame 14b on the lower side in FIG. Is set.

  In the third embodiment, only the width of the outer frame portion 14b is set long without shortening the width of the inner frame portion 14a. Therefore, the notch portion 14c can be formed deeply in the outer frame portion 14b. In addition, it is possible to satisfactorily enhance the dew condensation prevention effect after sufficiently securing the dust prevention effect by the inner frame portion 14a.

  Further, for example, a dustproof packing 14E having a shape as shown in FIG. Unlike the dustproof packings 14A to 14D of the second and third embodiments, the dustproof packing 14E has a trapezoidal frame shape, and a frame corresponding to the oblique side that is the right side in FIG. 5 protrudes outside the panel surface 11a. It is configured as a portion 14b, and a communication port S3 is formed between the inner peripheral surface of the outer frame portion 14b and the peripheral end surface of the panel surface 11a.

  In some cases, the inner wall of the case 13 that holds the liquid crystal display panel 11 and the protection panel 12 is an inclined surface that intersects on an extension line of one side of the panel surface 11a, for example. Therefore, in such a vehicle air-conditioning panel 1, the dust-proof packing 14 </ b> E has a trapezoidal frame shape as in the fourth embodiment, and the dust-proof packing 14 </ b> E is arranged so that the frame corresponding to the oblique side is along the inner wall of the case 13. Thus, in addition to the above-described dust-proof effect and the like, an effect that the outer peripheral portion of the dust-proof packing 14E is easily aligned can be obtained.

(Modification)
In the first to fourth embodiments, the outer frame portion 14b is arranged outside the inner frame portion 14a over substantially the entire circumference of the panel surface 11a except for the outer frame portion 14b that forms the communication port S3. Not limited to this, for example, as shown in FIG. 6, except for the frame portion forming the communication port S3, only the inner frame portion 14a having no outer frame portion 14b on the outer side is arranged in the plane of the panel surface 11a. You may comprise as follows. In FIG. 6, the members having the same functions as those shown in FIG. 3 or FIG.

  The dust-proof packings 14A to 14C shown in FIGS. 6 (a) to 6 (c) are compared with the dust-proof packing 14 shown in FIG. 6 (f) (the inner frame portions 14a are all disposed within the panel surface 11a). 6a to 6c, the inner frame portion 14a facing up and down so that the width of the outer frame portion 14b is increased by the amount corresponding to the shortened width of the inner frame portion 14a corresponding to the lower side in FIGS. The inner dimension between them is set to be wide. And the notch part 14c is formed from the inner peripheral side of the inner side frame part 14a to the outer side frame part 14b, and the communicating port S3 is formed between the inner peripheral surface of the notch part 14c, and the peripheral end surface of the panel surface 11a. It is like that.

  Also according to this modification, as in the second embodiment, it is possible to reduce the protruding space of the outer frame portion 14b to the outside of the panel surface 11a.

  Further, the dust-proof packing 14D shown in FIG. 6D is compared with the dust-proof packing 14 shown in FIG. 6F so that the width of the outer frame portion 14b is not less than the set length in FIG. 6D. The width of the lower side is set. However, the inner dimensions of the inner frame portions 14a facing each other in the vertical direction are set similarly to the case of the dustproof packing 14 shown in FIG.

  Also in this modified example, as in the third embodiment, by setting only the width of the outer frame portion 14b to be long, the dust prevention effect by the inner frame portion 14a is sufficiently secured, and the dew condensation preventing effect is improved satisfactorily. be able to.

  In the first embodiment, etc., only one convex outer frame portion 14b is provided in the dustproof packing 14 (FIGS. 3 and 6 (f)). In the second and third embodiments, the dustproof packings 14A to 14D are provided. In FIG. 5 (a) to 5 (d) and FIGS. 6 (a) to 6 (d), in Example 4 and the like, the outer side corresponding to the hypotenuse in the dustproof packing 14E. Although only one frame portion 14b is provided (FIGS. 5E and 6E), a plurality of each may be provided at an arbitrary position in consideration of the ventilation effect.

1 Vehicle air-conditioning panel (in-vehicle display device)
11 Liquid crystal display panel 11a Panel surface 12 Protective panel 13 Cases 14, 14A to 14E Dust-proof packing (seal material)
14a Inner frame part 14b Outer frame part 14c Notch part S1, S2 Space S3 Communication port

Claims (2)

A liquid crystal display panel, a protective panel disposed at a predetermined space with respect to the panel surface to protect the panel surface of the liquid crystal display panel, a case for holding the liquid crystal display panel and the protective panel; In a vehicle-mounted display device comprising: a sealing material disposed in an elastically compressed state between the panel surface of the liquid crystal display panel and the protective panel or the case,
The sealing material has an inner frame portion disposed on the inner periphery of the panel surface and an outer frame portion disposed on the outer periphery of the panel surface, and is connected so that the outer frame portion is connected. A part of the inner frame portion is recessed, and the inner frame surface of the outer frame portion corresponding to the recessed portion of the inner frame portion and the peripheral end surface of the panel surface. In addition, the vehicle-mounted display device is characterized in that a communication port is formed for communicating the space with a space formed on the opposite side of the panel surface of the liquid crystal display panel.   The outer frame portion is formed in a convex shape that bypasses and connects the concave portion of the inner frame portion, and the communication between the inner peripheral surface of the convex portion and the peripheral end surface of the panel surface. The in-vehicle display device according to claim 1, wherein a mouth is formed.

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