JP6677666B2 - Display device - Google Patents

Description

  The present invention relates to a display device.

  2. Description of the Related Art In a vehicle cabin or the like, a decorative panel having a leather-like appearance may be used to give a sense of quality. On the other hand, in recent automobiles, various display devices and functional components are provided on an instrument panel in a driver's seat. For example, in addition to existing instruments such as speedometers, tachometers, fuel gauges, and air conditioners, switches for opening and closing windows, and door locks, etc., display units and operation units for car navigation systems In addition, various display devices and operation units such as an external monitor, a light, a decoration unit, and the like are provided. As described above, even if a leather-like decorative panel is used, most of the area around the driver's seat and the front passenger's seat is occupied by these display units and operation units, and a sufficient sense of luxury and decorativeness is obtained. Is difficult to obtain.

  In addition, even in a room of a building (office building, hotel, store, general home, etc.), even if a high-quality wall material or the like is used, a large number of display devices and its operation units in the room may cause the high quality of the wall material. Feeling and decorativeness may be impaired.

  Patent Document 1 discloses that a transparent urethane skin is adhered to a wide area including a display area where a light emitting element is provided, so that a display unit and an operation unit can be visually recognized during light emission, and the entire surface is transmitted during non-light emission. There is disclosed an invention in which the appearance of a skin pattern of a synthetic urethane synthetic leather is obtained. Patent Document 2 discloses a polyurethane resin which is not aromatic but has durability.

Japanese Patent No. 4900877 Japanese Patent No. 5401320

  In the invention described in Patent Literature 1, a permeable urethane synthetic leather is used, but the specific configuration is not mentioned. Therefore, it is not easy to make the display unit and the operation unit visually recognizable during the actual light emission, and to make the display unit and the operation unit invisible when the light is not emitted. In addition, no consideration is given to the feel and durability of the permeable urethane synthetic leather, and there is a possibility that the appearance may be deteriorated due to the poor feel of the luxurious feel or the deterioration of the permeable urethane synthetic leather over time.

  Therefore, an object of the present invention is to provide a highly reliable display device that can obtain high decorativeness while maintaining functions of various display units and operation units without impairing them.

The display device of the present invention includes a display element including a light source, and a surface film disposed so as to overlap the display element, wherein the surface film has a thickness of 300 μm or more and 2 mm or less and a thickness of 3% or more and 60% or less. have a total light transmittance, or the type a hardness conforming to JIS K6253 of the surface film (instantaneous value) is 40 or more 95 or less, or type D hardness (5 seconds later) is 30 or more and 50 or less.

  ADVANTAGE OF THE INVENTION According to the display apparatus of this invention, high decorativeness can be obtained, maintaining the function of various display parts and operation parts without spoiling.

It is a mimetic diagram showing the luminescence state of a display inside a vehicle interior containing a display of one embodiment of the present invention. FIG. 2 is a schematic diagram showing a non-light emitting state of a display device in the interior of the vehicle interior shown in FIG. 1. FIG. 1 is a cross-sectional view schematically illustrating a configuration of a display device of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 are schematic views showing the interior of a vehicle cabin provided with a display device according to an embodiment of the present invention. The display device of the present invention is employed in a wide range (a range close to the entire surface) of an instrument panel (instrument panel) located in front of a driver's seat and a passenger seat. That is, in the examples shown in FIGS. 1 and 2, a vehicle data display unit 1 including a speedometer and a tachometer, a display unit of a car navigation system (a touch panel serving as a display unit and an operation unit) 2, A received data display unit (may be an Internet terminal) 3 for displaying the latest news, weather forecast, road conditions, and other images received, a monitor 4 for displaying video, a hazard lamp switch 5, an air conditioner A switch 6 (the air vent 12 of the air conditioner is shown in FIGS. 1 and 2) is provided, and these employ the display device of the present invention. The monitor 4 displays an image outside the vehicle or is used as a television receiver. Also, a warning display unit 7 provided on a pillar unit, a window open / close switch 8 and a door lock switch 9 provided on a door, a decoration and lighting panel 10 and an operation panel 11 provided on a console are also provided. The display device of the present invention is employed. The warning display unit 7 informs the driver of an abnormality or danger detected by a sensor or the like. The decoration and lighting panel 10 is used as indirect lighting or luminous decoration. The operation panel 11 is a remote switch for locking each door and opening / closing a window from a driver's seat. These display devices employ the display device of the present invention. When light is emitted, the display is clearly displayed as shown in FIG. 1, but when light is not emitted, the display is invisible and the surface film is visible.

As shown in FIG. 3, the display device of the present embodiment, which is widely used in the vehicle interior shown in FIGS. 1 and 2, has a structure in which a surface film (sheet) 101 is superimposed on a surface of a display element 100 including a light source. have. When a large number of display devices are provided as shown in FIG. 1, the surface film 101 can be shared as shown in FIG. That is, by attaching the display elements 100 at a plurality of locations on the back surface (the surface not exposed to the outside) of the large-area surface film 101, a good seamless appearance can be obtained, and production is facilitated to improve efficiency. It is possible to reduce the cost while doing so. The display element 100 including the light source is not particularly limited, and may have a conventionally known configuration including a liquid crystal element, an electroluminescence element, an LED, and the like. The surface film 101 of the present embodiment has the following characteristics.
Material: olefinic thermoplastic elastomer or non-aromatic durable urethane (as the non-aromatic durable urethane, a polyurethane resin described in Patent Document 2 may be used).
Transmittance: Total light transmittance (measured by a method according to JIS K7361) of 3% to 60% (preferably 5% to 50%, more preferably 10% to 40%)
Thickness: 300 μm or more and 2 mm or less (preferably 300 μm or more and 1 mm or less)
Type A hardness (instantaneous value) according to JIS K6253: 40 or more and 95 or less
Alternatively, Type D hardness (after 5 seconds): 30 or more and 50 or less Surface condition: smooth or uneven shape (in the case of a shape having unevenness, it may have a geometric shape or a leather-like shape. Among them, particularly, It is preferably a grain shape in which fine irregularities of 1 μm to 10 μm are formed in large irregularities of 200 μm to 500 μm.)
60-degree specular glossiness in accordance with JIS Z8741: 5% or less (preferably 3% or less)

  Explaining these characteristics, as a material, for example, milastomer (trade name of Mitsui Chemicals, Inc.), which is an example of an olefin-based thermoplastic elastomer, is preferably used, and the fine dispersion rubber component contained therein causes the display element 100 to have a fine dispersion. A light-shielding property and a good tactile sensation during non-light emission are obtained, and translucency during light emission is secured by a polyolefin resin component such as polypropylene or polyethylene. Using these materials, a total light transmittance of 3% or more and 60% or less (preferably 5% or more and 50% or less, more preferably 10% or more and 40% or less) is realized, and good display visibility during light emission is realized. In addition, a light shielding property is realized so that the light emitting element located under the surface film 101 cannot be seen through when light is not emitted.

  In addition, the action of the finely dispersed rubber component, a certain degree of thickness, appropriate hardness, and embossed shape realize a high-class touch similar to that of real leather, and a non-glossy (matte appearance instead of gloss) ) Has been realized. The thickness and hardness may be appropriately set within the above-described preferred ranges.

If the surface film (sheet) 101 is composed of an olefin-based thermoplastic elastomer, the improvement of wear resistance and scratch resistance, for touch and gloss adjusting, thin surface with urethane coating agent (a few mu m the number on the thickness of tens of mu m) may be coated.

  For the purpose of reinforcing the transmittance, tactile sensation, durability and the like of the surface film 101, other additives may be included. Additives include inorganic pigments such as carbon black and titanium oxide, organic pigments, dyes, heat stabilizers, light stabilizers, crosslinking agents, dispersants, lubricants, anti-slip agents, nucleating agents, foaming agents, and antibacterial agents. Agents, deodorants, adsorbents, conductive agents, flame retardants and the like. The additives may be added to a coating (coating agent) located on the surface of the surface film 101, or may be added to an adhesive layer located on the back surface of the surface film 101, instead of being added to a layer constituting a main part of the surface film 101 according to the purpose. It may be added to a layer or a laminate layer.

  Furthermore, according to the surface film 101 of the present embodiment, excellent durability can be realized. That is, the surface film 101 is excellent in heat resistance, light resistance, pressure resistance, water resistance, abrasion resistance, and abrasion resistance, and is resistant to sagging and bleed-out. Specifically, even after long-term use, the surface state is unlikely to change and the grain shape can be maintained. One of the reasons that the surface state is unlikely to change and settling hardly occurs is that a crosslinked rubber is contained. Further, since the surface film 101 of the present embodiment does not contain a large amount of a low molecular weight (or volatile) plasticizer such as vinyl chloride, the plasticizer is unlikely to be embossed to give a sticky feeling. Yellowing such as typical urethane hardly occurs.

  The olefin-based thermoplastic elastomer can provide a good tactile sensation by including the crosslinked rubber fine particles. In order to suppress a decrease in transparency and display visibility, specifically, to prevent a display image from being obscured by scattering of light by the crosslinked rubber fine particles, a part of the thickness of the surface film 101 is changed to an olefin-based thermoplastic elastomer. Alternatively, the portion having another thickness may be formed of another member (base material) having high transparency. At that time, the thickness of the olefin-based thermoplastic elastomer layer is preferably 10 to 200 µm or less, more preferably 20 to 100 µm. The olefin-based thermoplastic elastomer layer and the above-mentioned highly transparent substrate are laminated to form a surface film 101 having a multilayer structure. The highly transparent substrate prevents a decrease in the strength of the surface film 101. . Examples of the highly transparent substrate include films, sheets and plates made of polyolefin resins such as polyethylene and polypropylene, polyester, polycarbonate, acrylic and the like. Since the front surface is a thin olefin-based thermoplastic elastomer, it has an excellent balance of high-grade appearance, touch, and clarity, and the back surface is made of a transparent material, which does not hinder light emission from the display device. The surface film 101 has excellent strength.

  As described above, according to the display device of the present embodiment, the high-grade appearance and tactile sensation of the surface film 101 can be realized, the display during light emission can be clearly recognized, and the display element 100 does not stand out during non-light emission. Good appearance (decorative property) of the surface film 101 which has been obtained, and is resistant to heat, light, pressure, moisture, abrasion, and rubbing, and hard to cause set, bleed out, and yellowing. Extremely high durability can be realized. As described above, a display device which is excellent in various viewpoints has not been realized conventionally, but is first realized in the present invention by defining various characteristics as described above.

  The surface film 101 of the present invention may have a multilayer structure as described above, and a substrate laminated and supporting a film made of an olefin-based thermoplastic elastomer or the like includes a piezoelectric film, a mirror film, and a conductive film. , A metal deposited film, a film having a circuit pattern, a touch panel, or the like. The appearance of the surface film 101 is not limited to the leather shape as described above, and may be a woodgrain, a wallpaper, a metal, a stone, a tile, or the like.

  Further, the surface film 101 of the present invention further has an advantage of being excellent in moldability. For example, it is particularly excellent in thermal adhesiveness and curved surface follow-up when it is brought into close contact with glass or resin glass disposed on the surface of the display element 100, and is evacuated while being pressed to be integrally molded. That is, since the surface film 101 of the present invention is firmly adhered to any display element 100 without any gap, a display device having a desired shape can be easily formed. In this respect, the surface film is preferably formed from a thermoplastic material.

It should be noted that the monitor 4 shown in FIGS. 1 and 2 may be a full-screen monitor using the entire instrument panel in front of the passenger seat, and may display an image of the rear or blind spot position of the vehicle, or display the position of the vehicle. May be provided as a bird's-eye view, or may be displayed together with additional information (such as road information ). The decoration and lighting panel 10 may function as a lighting member such as a room lamp, a map light, a reading light, or a decorative indirect lighting when the vehicle is stopped. It may be a simple decorative member. Further, the decoration and lighting panel 10 may be one that performs the same video display as the monitor 4 and functions as a sub-monitor.

  The display device of the present invention is not limited to the interior of an automobile, but can be used as a part of the interior of a building (office building, hotel, store, general home, or the like). Furthermore, it can be applied to all kinds of applications such as LCD TVs, lighting switches, bathroom monitors, furniture, audio equipment, speakers, home appliances (rice cookers, microwave ovens, washing machines, air conditioner panels, telephones, remote controls, etc.). is there.

REFERENCE SIGNS LIST 1 vehicle data display unit 2 car navigation system display unit 3 reception data display unit 4 monitor 5 hazard lamp switch 6 air conditioner switch 7 warning display unit 8 window open / close switch 9 door lock switch 10 decoration and lighting panel 11 operation panel 12 ventilation Mouth 100 Display element 101 Surface film

Claims (8)

A display element including a light source, and a surface film disposed so as to overlap the display element, wherein the surface film has a thickness of 300 μm or more and 2 mm or less and a total light transmittance of 3% or more and 60% or less. Yes, and
A display device, wherein the surface film has a Type A hardness (instantaneous value) of 40 to 95 or a Type D hardness (after 5 seconds) of 30 to 50 according to JIS K6253 .   The display device according to claim 1, wherein the thickness of the surface film is 300 μm or more and 1 mm or less.   The display device according to claim 1, wherein a total light transmittance of the surface film is 5% or more and 50% or less.   4. The display device according to claim 1, wherein the surface film includes an olefin-based thermoplastic elastomer. 5. The surface film, in a large unevenness of 200μm or 500μm or less, having a grain shape 10μm or less fine irregularities or 1μm is formed, a display device according to any one of claims 1 to 4. The display device according to any one of claims 1 to 5 , wherein the surface film has a glossiness of 5% or less in 60-degree specular glossiness according to JIS Z8741. The display device according to any one of claims 1 to 6 , wherein the display device is incorporated in an interior of an automobile. Are arranged so as to overlap with the display device including a light source, possess a 2mm thickness of no less than 300 [mu] m, a total light transmittance of 3% or more and 60% or less,
A surface film having a Type A hardness (instantaneous value) of 40 or more and 95 or less or a Type D hardness (after 5 seconds) of 30 or more and 50 or less according to JIS K6253 .

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