JP2018144511A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable display device that can obtain high decorativeness while maintaining various functions of display units and operation units without impairing them.SOLUTION: A display device has a display element 100 having a light source, and a surface film 101 disposed so as to overlap the display element 100. The surface film 101 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.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display device.

  In an automobile cabin or the like, a decorative panel having a leather-like appearance may be used to give a high-class feeling. On the other hand, in recent automobiles, various display devices and functional parts are provided on the instrument panel of the driver's seat. For example, in addition to conventional instruments such as speedometers, tachometers, fuel gauges, and switches such as air conditioners, window opening / closing and door locks, etc., display units and operation units of car navigation systems A wide variety of display devices and operation units such as an external monitor, illumination, and a decoration unit are provided. As mentioned above, even if leather-like decorative panels are used, especially around the driver's seat and passenger's seat are mostly occupied by these display units and operation units. Is difficult to obtain.

  In addition, even in the interior of buildings (office buildings, hotels, stores, ordinary homes, etc.), even if high-quality wall materials are used, the high-quality wall materials are used by the display devices and their operation units that exist in the rooms. Feeling and decoration may be impaired.

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

Japanese Patent No. 4900907 Japanese Patent No. 5401320

  In the invention described in Patent Document 1, 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 visible when light is actually emitted and to make the display unit and operation unit not visible when light is not emitted. Further, the touch feeling and durability of the permeable urethane synthetic leather are not taken into consideration at all, and there is a possibility that the sensation of feeling of luxury is poor or that the appearance is deteriorated due to aged deterioration of the permeable urethane synthetic leather.

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

  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. The surface film has a thickness of 300 μm to 2 mm and 3% to 60%. Has total light transmittance.

  According to the display device of the present invention, high decorativeness can be obtained while maintaining the functions of various display units and operation units without impairing the functions.

It is a schematic diagram which shows the light emission state of a display apparatus of the interior of a vehicle interior containing the display apparatus of one Embodiment of this invention. It is a schematic diagram which shows the non-light-emission state of the display apparatus of the interior of the compartment shown in FIG. It is sectional drawing which shows the structure of the display apparatus of this invention roughly.

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 are schematic views showing the interior of a vehicle compartment 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) positioned in front of the driver's seat and the 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 (may be a touch panel that serves as both a display unit and an operation unit), Received data display section (may be an Internet terminal) 3 for displaying the latest news, weather forecast, road conditions and other images received, monitor 4 for displaying video, hazard lamp switch 5, and air conditioner A switch 6 (shown in FIG. 1 and FIG. 2 shows the air outlet 12 of the air conditioner), which employs the display device of the present invention. The monitor 4 displays images outside the vehicle and is used as a television receiver. Further, a warning display section 7 provided in the pillar section, a window opening / closing switch 8 and a door lock switch 9 provided in the door, a decoration and lighting panel 10 and an operation panel 11 provided in the console, The display device of the present invention is employed. The warning display unit 7 notifies the driver of abnormality or danger detected by a sensor or the like. The decoration and illumination panel 10 is used as indirect illumination or light emission decoration. The operation panel 11 is a remote switch for locking doors and opening / closing windows from the driver's seat. These display devices employ the display device of the present invention. When the light is emitted, the display device is clearly displayed as shown in FIG.

As shown in FIG. 3, the display device of the present embodiment, which is adopted in large numbers in the passenger compartment shown in FIGS. 1 and 2, has a configuration in which a surface film (sheet) 101 is superimposed on the surface of a display element 100 including a light source. have. When many 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 to a plurality of locations on the back surface (surface not exposed to the outside) of the large-area surface film 101, a good appearance with no joints can be obtained, and manufacturing is facilitated to improve efficiency. Cost. 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 electroluminescent element, an LED, and the like. And the surface film 101 of this embodiment has the characteristic described below.
Material: Olefin-based thermoplastic elastomer, or non-aromatic durable urethane (The polyurethane resin described in Patent Document 2 may be used as non-aromatic durable urethane)
Transmittance: Total light transmittance of 3% to 60% (preferably 5% to 50%, more preferably 10% to 40%)
Thickness: 300 μm to 2 mm (preferably 300 μm to 1 mm)
Type A hardness (instantaneous value) according to JIS K6253: 40 to 95
Or type D hardness (after 5 seconds): 30 or more and 50 or less Surface state: Smooth or uneven shape (In the case of a shape having unevenness, it may have a geometric shape or leather-like shape. (It is preferably a textured 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 gloss according to JIS Z8741: 5% or less (preferably 3% or less)

  When these characteristics are described, for example, Miralastomer (trade name of Mitsui Chemicals, Inc.), which is an example of an olefin-based thermoplastic elastomer, is preferably used as the material, and the display element 100 has a finely dispersed rubber component contained therein. The light-shielding property at the time of non-light emission and good tactile sensation are obtained, and the light-transmitting property at the time of light emission is secured by a polyolefin resin component such as polypropylene and 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 achieved. The light-shielding property is also realized so that the light-emitting element located under the surface film 101 can be seen through when no light is emitted.

  In addition, the fine dispersion rubber component, a certain degree of thickness, appropriate hardness, and embossed shape realize a high-quality feel similar to that of the main skin and a non-glossy appearance (a matte appearance rather than a glossy appearance). ) Is realized. What is necessary is just to set suitably regarding thickness and hardness within the preferable range mentioned above.

  When the surface film (sheet) 101 is made of an olefin-based thermoplastic elastomer, the surface is thinned with a urethane-based coating agent (several μ to several μm) in order to improve wear resistance and scratch resistance, and to adjust the touch and gloss. It may be coated (to a thickness of 10μ).

  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, antibacterial agents Agents, deodorants, adsorbents, conductive agents, flame retardants and the like. Depending on the purpose, the additive may be added to a coating (coating agent) located on the surface of the surface film 101, or an adhesive located on the back surface of the surface film 101, instead of being added to the main layer of the surface film 101. You may add to a layer and a laminated body 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, wear resistance, and scratch resistance, and is also resistant to sag and bleed out. Specifically, even after long-term use, the surface state is unlikely to change and the textured shape can be maintained. One of the reasons why the surface state hardly changes and does not easily cause settling is that a crosslinked rubber is included. Further, since the surface film 101 of the present embodiment does not contain many low molecular weight (or volatile) plasticizers such as vinyl chloride, the plasticizers are less likely to be raised and have a sticky feel. Yellowing like conventional urethane is also difficult to occur.

  The olefinic thermoplastic elastomer can provide a good tactile sensation when it contains crosslinked rubber fine particles. In order to suppress a decrease in transparency and display visibility, specifically, in order to prevent ambiguity of the display image due to light scattering by the crosslinked rubber fine particles, a part of the thickness of the surface film 101 is olefin-based thermoplastic elastomer. As a matter of course, the other thickness portion may be constituted by another member (base material) having high transparency. The thickness of the olefinic thermoplastic elastomer layer at that time is preferably 10 to 200 μm or less, more preferably 20 to 100 μm. This olefinic thermoplastic elastomer layer and the above-described highly transparent base material are laminated to form a surface film 101 having a multi-layer structure, and the strength of the surface film 101 is prevented from being lowered by the highly transparent base material. . Examples of the highly transparent substrate include films, sheets, and plates made of polyolefin resins such as polyethylene and polypropylene, polyester, polycarbonate, and acrylic. The thin olefin-based thermoplastic elastomer has an excellent balance of high-quality appearance, tactile sensation, and clarity, and the back surface is a transparent material that hardly interferes with light emission from the display device. It becomes the surface film 101 which is excellent also in the intensity | strength of.

  As described above, according to the display device of this embodiment, the surface film 101 can have a high-quality appearance and tactile sensation, and the display at the time of light emission can be clearly seen, and the display element 100 is not conspicuous at the time of non-light emission. The surface film 101 can have a good appearance (decorative property) sufficiently, and is resistant to heat, light, pressure, moisture, abrasion, rubbing, and is not susceptible to dripping, bleeding out or yellowing. Extremely excellent durability can be achieved. Thus, a display device that is excellent in various viewpoints has not been realized in the past, and is realized for the first time 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 the base material laminated and supported by a film made of an olefin-based thermoplastic elastomer or the like is a piezoelectric film, a mirror film, or a conductive film. It may be a metal vapor deposition 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 wood tone, wallpaper tone, metal tone, stone tone, tile tone, or the like.

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

  The monitor 4 shown in FIGS. 1 and 2 can be a full-scale monitor that uses the entire instrument panel in front of the passenger seat, displays images of the rear and blind spot positions of the vehicle, May be displayed in a bird's-eye view, or may be displayed together with additional information (such as above the road). The decorative and lighting panel 10 may function as an illumination member for a room lamp, a map light, a reading light, decorative indirect lighting, etc., particularly when stopped, and is designed with colored dots and lines that emit light. A decorative member may be used. Further, the decoration and illumination panel 10 may display the same video as the monitor 4 and function as a sub monitor.

  The display device of the present invention is not limited to the interior of an automobile, and can also be used as part of the interior of a building (such as an office building, a hotel, a store, or a general household). Furthermore, it can be applied to various 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.

DESCRIPTION OF SYMBOLS 1 Vehicle data display part 2 Display part of car navigation system 3 Reception data display part 4 Monitor 5 Hazard lamp switch 6 Air conditioner switch 7 Warning display part 8 Window open / close switch 9 Door lock switch 10 Decoration and lighting panel 11 Operation panel 12 Air blower Mouth 100 Display element 101 Surface film

Claims (9)

  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 to 2 mm and a total light transmittance of 3% to 60%. A display device comprising the display device.   The display device according to claim 1, wherein a thickness of the surface film is 300 μm or more and 1 mm or less.   The display device according to claim 1, wherein the total light transmittance of the surface film is 5% or more and 50% or less.   The display device according to claim 1, wherein the surface film includes an olefin-based thermoplastic elastomer.   The type A hardness (instantaneous value) according to JIS K6253 of the surface film is 40 or more and 95 or less, or the type D hardness (after 5 seconds) is 30 or more and 50 or less. Item 1. A display device according to item 1.   The display device according to claim 1, wherein the surface film has a textured shape in which fine irregularities of 1 μm to 10 μm are formed in large irregularities of 200 μm to 500 μm.   The display device according to any one of claims 1 to 6, wherein the surface film has a gloss of 5% or less at a 60-degree specular gloss according to JIS Z8741.   The display device according to claim 1, which is incorporated in an interior of an automobile.   A surface film which is disposed so as to overlap with a display element including a light source and 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.

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