JPH0348517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a light control film used for nameplates and the like.

<Prior art> Light control films have the function of transmitting only light rays in a specific direction, and are used, for example, in various display parts on automobile dashboards, so that light irradiated from inside the front It has the effect of preventing reflections on surrounding glass such as glass.

<Problems to be Solved by the Invention> A display section using a light control film has a dark interior during the daytime when no lighting is used, so it looks black, making the display difficult to see and giving an unfavorable impression in terms of design.

The present invention has focused on this point, and has been made with the object of providing a light control film that can form a display section that does not look black even when it is not illuminated.

<Means for Solving the Problems> In order to solve the above problems, the present invention consists of a louver body equipped with a thin honeycomb frame, a lattice frame, or a parallel frame, and the light rays from a light source disposed opposite to one end face of the louver body are provided. Among them, in a light control film that transmits only light rays in a specific direction determined by the height and spacing of the frame of the louver body to the other end surface side, a light reflecting portion is formed at least on the other end surface of the louver body opposite to the light source installation side. The present invention provides a light control film characterized by:

<Function> According to the light control film of the present invention, the light reflecting portions provided on the upper and lower end surfaces or one end surface of the frame body in the height direction of the louver body reflect light incident from the outside, so that the surrounding area is bright and internal illumination is improved. The display part no longer looks black when not in use, and it does not affect the light emitted from inside at all. Therefore, the display becomes easier to see, the design is improved, and it is also possible to color the display as necessary, for example, it is easy to make the display part red for warning.

<Example> An illustrated embodiment will be described below.

FIG. 1 shows an example of a display section using the light control film of the present invention as a nameplate, in which 1 shows the light control film, 2 shows the light source disposed inside, and 3 shows the cutout printed part on the surface. .

Consists of a thin honeycomb frame-shaped louver body 11,
Transparent resin films 12 and 13 are laminated on both upper and lower end surfaces of the honeycomb frame of the louver body 11,
Although it is basically the same as the conventionally known light control film, the present invention differs in that a light reflecting portion 14 is formed on the end face of the louver body 11. Although the louver body 11 has a honeycomb shape in this embodiment, it may have a parallel shape, a lattice shape, etc. The louver body 11 made of these frame bodies is a thin plate shape and has a light-shielding property that absorbs light and does not reflect it. It can be manufactured as appropriate using conventionally known methods. Further, the light reflecting section 14 is
For example, the louver body 11 is printed with ultraviolet curing paint.
The louver body 1 may be etched at the same time as the louver body 1 is formed, or a light reflective paint may be printed only on the end face of the louver body 11 before the resin film 1 is laminated.
It can be formed by bonding a metal thin film having the same planar shape as the first one.

FIG. 2 shows an example of the shape of the light reflecting section 14 formed in this way, and the light reflecting section 14 is formed in the same shape on the end face of the honeycomb-shaped louver body 11.

The light control film 1 of this embodiment has the above-described configuration, and at night, the light rays from the light source 2 are transmitted upward in FIG. 1 within a certain angle determined by the height and spacing of the louver bodies 11. However, the light reflecting section 14 has no effect on the transmitted light at this time, and the same light control effect as in the prior art is exerted as is. In addition, during the daytime when the light source 2 is not used, the area where the light source 2 is placed becomes dark, but the light 4 incident from the outside (the upper part of FIG. When viewed from above, the display looks bright and easy to read, and it doesn't look dark or holey.

Further, if the light reflecting section 14 is colored, the display section will appear colored during the daytime, so that it is possible to perform display in a desired color. Furthermore, the effect can be further enhanced by forming the light reflecting section 14 from a material with high reflectance or by making the surface reflect light diffusely. In the above embodiment, the louver body 1
Although the light reflecting portion is formed on one end surface of the light reflecting portion 1, it goes without saying that it may be formed on both end surfaces.

Note that if the display unit as in the embodiment is directly incorporated into an operation knob or the like, an operation unit having a display with internal illumination can be obtained.

<Effects of the Invention> As described above, since the present invention forms a light reflecting part on the end face of the louver body, when used in a display part with internal lighting, it does not look dark during the daytime. The display can be easily seen and the display section can be designed to be easily mounted on the body, and it is also easy to make the display visible during the daytime, which has the advantage of enabling color display.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a plan view showing an example of the shape of a light reflecting portion. DESCRIPTION OF SYMBOLS 1... Light control film, 11... Louver body, 14... Light reflection part.

Claims (1)

[Claims] 1. A louver body comprising a thin honeycomb frame, a lattice frame, or a parallel frame, and among the light rays from a light source disposed opposite to one end surface, the height and spacing of the frames of the louver body are determined A light control film that transmits only light rays in a specific direction to the other end surface, characterized in that a light reflecting portion is formed on at least the other end surface of the louver body opposite to the light source installation side.