JP2015191193A - display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that maintains a waterproof performance without degradation in display quality.SOLUTION: A display panel 10 displays an image. A protective panel member 20 allows the image to be visible through the protective panel member 20. A ring gasket 50 is provided on an edge of the protective panel member 20. A case 30 contains the display panel 10. The display panel 10 adheres to the protective panel member 20 by using a translucent adhesive 15. The case 30 is made of resin and has an upper case 31 and a lower case 32 that press the gasket 50. The upper case 31 is in no contact with the protective panel member 20. The upper case 31 has a contact portion 31d contacting with the lower case 32. The lower case 32 is fixed on the upper case 31 by using a self-tapping screw 35.

Description

  The present invention relates to a display device including a display panel for displaying an image.

  As a conventional display device, for example, there is one disclosed in Patent Document 1. The display device according to Patent Document 1 has a structure in which the air layer between the transparent cover plate and the liquid crystal display device is filled with a photocurable adhesive, thereby reducing reflection at the air layer interface as much as possible. The display quality can be kept good.

JP 2009-25833 A

  However, in a display device having a structure in which a cover plate and a display are bonded with a photo-curing adhesive as in Patent Document 1, waterproofness must be taken into account depending on the usage. For example, when such a display device is used outdoors, it is particularly necessary to improve waterproofness from the display side.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a display device having good waterproofness from the display side.

  The present invention includes a display panel for displaying an image, a protective panel member through which the image can be seen, an annular packing provided at an edge of the protective panel member, a case body for housing the display panel, The display panel is bonded to the protective panel member with a translucent adhesive, and the case body is made of resin, and includes an upper case and a lower case that press the packing. And the lower case is a display device screwed to the upper case, and the protective panel member is in contact with the packing between the upper case and the lower case.

  The protective panel member is a touch panel type.

  In the present invention, the packing has a through-hole through which a flexible connecting member extending from the display panel passes.

  In the present invention, the through hole is a cutout portion cut out to substantially the same length as the connection member.

  The display quality is not deteriorated and the waterproof performance can be maintained.

The front view which shows 1st embodiment of this invention. AA sectional drawing which shows embodiment same as the above. BB sectional drawing which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above. The AA sectional view showing the second embodiment of the present invention. BB sectional drawing which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 4 show a first embodiment. The vehicle display device includes a liquid crystal display panel 10, a cover plate 20, a case body 30, a circuit board 40, and a packing 50.

  The liquid crystal display panel 10 includes a TFT color liquid crystal module, and displays vehicle information such as vehicle speed. The liquid crystal display panel 10 may be of a multi-dot or segment type, and may be a single color display or a full color display. The display panel may be an EL module. The liquid crystal display panel 10 is optically coated with a translucent adhesive 15 and is in close contact with the rear surface of the cover plate 20. The translucent adhesive 15 is a photo-curing adhesive.

The cover plate 20 is obtained by forming a light shielding portion 22 made of a black print layer on the rear surface of a flat plate-like transparent substrate 21, and has a rectangular shape when viewed from the front. The substrate 21 of the cover plate 20 may be made of inorganic glass or may be made of organic glass such as acrylic. The light shielding portion 22 of the cover plate 20 has a rectangular window portion 22a that allows the image of the liquid crystal display panel 10 to be seen through.
A touch panel 23 is formed on the surface of the substrate 21.

  The touch panel 23 is a resistive touch panel or a capacitive touch panel. The touch panel 23 is connected to the circuit board 40 by FPC or the like which is the flexible connection member 11, and output information is transmitted in response to an operation input. For the resistive touch panel, a glass-glass type with high durability without moisture permeation from the surface is desirable in consideration of outdoor use. In addition, in the capacitive touch panel, a glass sensor type, a glass film sensor type, or the like considering durability is desirable.

  The case body 30 is made of a resin such as AES, ABS, PP, and has an upper case 31 and a lower case 32. The case body 30 accommodates the liquid crystal display panel 10 and the circuit board 40. The upper case 31 of the case body 30 is provided at a front wall portion 31a substantially parallel to the liquid crystal display panel 10, a peripheral wall portion 31b formed perpendicularly from an outer edge of the front wall portion 31a, and an inner edge of the front wall portion 31a. A concealing portion 31c and a boss portion 31d that contacts the lower case 32. The boss portion 31d of the upper case 31 has a substantially cylindrical shape and has a prepared hole 31 into which the tapping screw 35 is inserted.

  The concealing portion 31c of the upper case 31 is concealed so that the packing 50 is difficult to be visually recognized. The concealing portion 31c of the upper case 31 has a protruding portion 31g that protrudes toward the cover plate 20 from the rear surface of the front wall portion 31a. The front surface of the concealing part 31c is an inclined surface.

  The lower case 32 of the case body 30 includes a bottom wall portion 32a substantially parallel to the liquid crystal display panel 10, a side wall portion 32b formed perpendicularly from the outer edge of the bottom wall portion 32a, and a front end portion from the side wall portion 32b. And a flange portion 32c provided vertically. A lower hole 32 k through which the tapping screw 35 is inserted is formed in the flange portion 32 c of the lower case 32. The lower case 32 is fixed to the upper case 31 with a tapping screw 35. The lower case 32 is in contact with the light shielding portion 22 and is not in contact with the cover plate 20.

  The circuit board 40 is obtained by forming a wiring pattern made of copper foil on a base material made of glass epoxy resin. The liquid crystal display panel 10 is electrically connected to the circuit board 40 by a flexible wiring member (not shown) such as an FPC.

  The packing 50 is made of a waterproof rubber such as EPDM, chloroprene rubber, or fluorine rubber. The packing 50 has an annular shape when viewed from the front, and is provided at the edge of the cover plate 20. In the first embodiment, the packing 50 has a U-shaped cross section, and includes a front surface portion 51 that contacts the front surface of the cover plate 20, a rear surface portion 52 that contacts the rear surface of the cover plate 20, and the cover plate 20. And a side surface portion 53 in contact with the peripheral end surface. A through hole 11 a through which the flexible wiring member 11 passes is formed in the side surface portion 53. The through-hole 11a is only required to be formed so that the flexible wiring member 11 is drawn out, and may be, for example, a cutout portion cut out to substantially the same length as the flexible wiring member 11.

  When the lower case 32 is fixed to the upper case 31 by the tapping screw 25, the front wall portion 31a of the upper case 41 abuts on the front surface portion 51 of the packing 50, and the flange portion 32c of the lower case 32 is the rear surface portion 52 of the packing 50. The packing 50 is pressed by the upper case 31 and the lower case 31.

  According to such an embodiment, the liquid crystal display panel 10 is not distorted and the display quality is not deteriorated, and even in a display device that has a large vibration and is used outdoors for a long time, the vibration resistance is high and long. Waterproof performance can be maintained over a period of time.

  The second embodiment will be described with reference to FIGS. The same symbols are attached to the same members, and the description thereof is omitted. FIG. 1 also represents a front view of the second embodiment.

  The case body 30 is made of a resin such as AES, ABS, PP, and has an upper case 31 and a lower case 32. The case body 30 accommodates the liquid crystal display panel 10 and the circuit board 40. The upper case 31 of the case body 30 is provided at a front wall portion 31a substantially parallel to the liquid crystal display panel 10, a peripheral wall portion 31b formed perpendicularly from an outer edge of the front wall portion 31a, and an inner edge of the front wall portion 31a. The cover part 31c, the boss part 31d that contacts the lower case 32, the pressing part 31e that presses the packing 50b against the flange part 32c, and the contact part 31f that the packing 50a contacts. The boss portion 31d of the upper case 31 has a substantially cylindrical shape and has a prepared hole 31 into which the tapping screw 35 is inserted. The contact portion 31f is sized to fit the packing 50a, and preferably has a concave shape.

  The concealing portion 31c of the upper case 31 is concealed so that the packing 50 is difficult to be visually recognized. The concealing portion 31c of the upper case 31 has a protruding portion 31g that protrudes toward the cover plate 20 from the rear surface of the front wall portion 31a.

  The lower case 32 of the case body 30 includes a bottom wall portion 32a substantially parallel to the liquid crystal display panel 10, a side wall portion 32b formed perpendicularly from the outer edge of the bottom wall portion 32a, and a front end portion from the side wall portion 32b. And a flange portion 32c provided vertically. A lower hole 32 k through which the tapping screw 35 is inserted is formed in the flange portion 32 c of the lower case 32. The lower case 32 is fixed to the upper case 31 with a tapping screw 35. The lower case 32 is in contact with the light shielding portion 22 and is not in contact with the cover plate 20.

  In the second embodiment, the packings 50 a and 50 b are annular when viewed from the front, and are provided at two locations on the edge of the cover plate 20 and the outer peripheral side of the tapping screw 35. The packing 50a has an oval shape, is disposed at the edge of the cover plate 20, and is pressed against the contact portion 31f. The packing 50b is disposed on the outer peripheral side of the tapping screw 35 between the pressing portion 31e of the upper case 31 and the flange portion 32c of the lower case 32, and is pressed by the pressing portion 31e. The shape of the packing 50 may be a shape that flattens when the packing 50 is compressed so that moisture does not enter from the edge of the cover plate 20 and the gap between the upper case 31 and the lower case 32. It may be V-shaped or semicircular.

  According to such an embodiment, the liquid crystal display panel 10 is not distorted and the display quality is not deteriorated, and even in a display device that has a large vibration and is used outdoors for a long time, the vibration resistance is high and long. Waterproof performance can be maintained over a period of time.

10 Liquid crystal display panel (display panel)
15 Translucent adhesive 20 Cover plate (protective panel member)
23 Touch panel 30 Case body 31 Upper case 31d Boss part (contact part)
32 Lower case 32c Flange part 35 Tapping screw (screw)
50 Packing (elastic member)

Claims (4)

A display panel for displaying an image; a protective panel member capable of seeing through the image; an annular packing provided at an edge of the protective panel member; and a case body for housing the display panel, A display device in which a display panel is bonded to the protective panel member with a translucent adhesive,
The case body is made of resin, and has an upper case and a lower case that press the packing,
In the display device, wherein the lower case is screwed to the upper case,
The display device, wherein the protective panel member is in contact with packing between the upper case and the lower case.   The display device according to claim 1, wherein the protection panel member is a touch panel type.   The display device according to claim 1, wherein the packing has a through-hole through which a flexible connecting member extending from the display panel passes. The display device according to claim 3, wherein the through-hole is a cutout portion cut out to substantially the same length as the connection member.

Images