JPS6156388A - Display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device suitably used for displaying characters in an audio device, for example.

BACKGROUND ART A display device used for character display or level display in an audio device, for example, emits light as a point light source from a holding member 2 attached to the lower part of a holding member 1 having an opening 5, as shown in FIG. A diode 3 is arranged, and a translucent display sheet 4 is arranged in front of the light emitting diode 3 in the light emission direction. In order to increase the display area of the display sheet 4, a light reflecting surface 6 is formed on the inner wall of the holding member 1 so that the light reflecting surface 6 slopes away from each other as it approaches the opening 5, thereby reflecting light from the light emitting diode 3. Constructed to be reflective.

In another prior art, as shown in FIG. 6, a plurality of openings 7 are formed close to each other in the holding member 1, and the light emitting diodes 3 are individually inserted into the holding member 2 attached to the lower part of the holding member 1. are arranged, and arbitrary light from the light emitting diodes 3 is read through a plurality of display sheets 4 located close to each other.

Problems to be Solved by the Invention In summary, when a single light emitting diode 3 is used as a light source, if the display area of the display sheet 4 is set to be large, the vicinity of the periphery of the display sheet 4 will become dark, resulting in uniform light emission. Function is impaired. In addition, when a plurality of light emitting diodes 3 are used as light sources, the thickness of each partition wall 8 between the openings 7 of the holding member 1 made of synthetic resin is thin (this makes it easier for light to pass through, making it appear as if they are adjacent to each other). This may create an illusion that the light emitting diode is emitting light, and the reliability of the display device will be reduced.

An object of the present invention is to solve the above-mentioned technical problems by arranging a light diffusing member and a display sheet in front of one or more light sources in the light emission direction, thereby making the light emission uniform. An object of the present invention is to provide a display device.

Means for Solving the Problems The present invention includes a light source, a first holding member for fixing the light source, a second holding member having an opening for guiding light from the light source fJ), and covering the opening end of the opening. A third light guide plate having a light diffusion member and a light guide plate that expands toward the downstream side in the light traveling direction from the light diffusion member, and the inner peripheral surface of the light guide hole is a reflective surface that reflects light. The display device includes a holding member and a translucent display sheet disposed at the opening end of the guide hole.

Effect According to the present invention, by arranging the light diffusing member and the display sheet in a double structure in front of the light source in the light emission direction, it is possible to make the light emission uniform, and therefore it is possible to improve the quality of the display device. It becomes possible.

Embodiment FIG. 1 is a sectional view of a display device 10 according to the present invention, and FIG. 2 is an exploded perspective view thereof. The display device 10 basically includes a light emitting diode 11 as a light source, a first holding member 12 that fixes the light emitting diode 11, and a light emitting diode 1.
a second holding member 13 having an opening 20 that guides light from the second holding member 13;
, a light diffusing member 14 that covers the upper open end 21 of the opening 20 of the first holding member 12 , and a second holding member (a third roughly cylindrical member disposed on the opposite side of the light diffusing member 13 ) of the light diffusing member 14 .
It includes a holding member 15 and a translucent display sheet 17 disposed on the opening end 16 side of the third holding member 15 opposite to the light diffusing member 14 . The first holding member 12 and the second holding member 13 are made of non-translucent synthetic resin or the like. Leading opening 20
has.

The light diffusing member 14 is mounted on the second holding member 13 so as to cover the upper open end 21 of the opening 20 of the second holding member 13 .

The light diffusing member 14 is made of a semi-transparent synthetic resin film or the like, and is configured to diffusely reflect the light from the light emitting diode 11 so as to provide uniform light emission on the display sheet 17 side.

A third holding member 15 is disposed on the other surface of the light diffusing member 14 opposite to the side facing the second holding member 13 . The third holding member 15 has an opening 20 of the second holding member 13.
A guide hole 22 is formed coaxially with the guide hole 22 . Guide hole 2
2 is connected to a lower opening end 23 that guides the light from the opening 20 into the guide hole 22 via the light diffusing member 14, and is located on the downstream side (upper part in FIG. 1) in the light traveling direction indicated by arrow A. It has an expanding inner circumferential surface 24, and the inner circumferential surface 24 is formed as a reflective surface that reflects light. The upper open end 16 of the third holding member 15 that is continuous with such a tapered guide hole 22 and guides the light from the guide hole 22 to the outside is covered with a display sheet 17. The display sheet 17 is made of a transparent synthetic resin film, and any display can be made on its surface by applying a light-shielding paint or fixing a metal piece to its surface, for example. Furthermore, the light diffused by the light diffusion member 14 passes through the guide hole 22 and is emitted uniformly onto the display sheet 17, so even if the display area of the display sheet 17 is set large, the uniformity of light emission is maintained. As a result, a sufficient display function is achieved.

FIG. 3 is a cutaway perspective view of another embodiment of the invention, and FIG. 4 is a plan view thereof. In this embodiment, a plurality of display devices 10 shown in the first figure are integrally arranged in a straight line in close proximity. The partition portion 25 of the second holding member 13 between adjacent light emitting diodes 11 is made of a light-shielding material, for example, black synthetic resin, to prevent light from the light emitting diodes 11 from leaking into the adjacent display device 10. prevent.

By preventing light leakage from the C light emitting diode 11 in this way, it becomes possible to obtain uniform and bright light emission for each display sheet 17 as shown in FIG. Therefore, the quality of the display device 10 can be improved.

Although a light emitting diode is used as the light source in the embodiments described above, a light source of other configurations, such as a fluorescent lamp, may be used. Also, between the third holding member 15 and the display sheet 17;
Alternatively, another light diffusing member may be arranged to further make the light emission uniform.

The display device according to the present invention is not only used for level display and character display of audio equipment, but also can be implemented in connection with a wide range of other technical fields.

Effects As described above, according to the present invention, there is provided a first holding member that fixes a light source that emits light, a second holding member that has an opening that guides light from the light source, and a light that covers one open end of the opening. a third holder having a diffusion member and a light guide hole that expands toward the downstream side in the direction in which light travels from the light diffusion member, and the inner circumference of the light guide hole is a reflective surface that reflects light; By providing the member and the light-transmitting display sheet disposed at the opening end of the guide hole, it is possible to make the light emission uniform, and therefore it is possible to improve the quality of the display device.

[Brief explanation of the drawing]

1 is a cross-sectional view of a display device 10 according to the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a cutaway perspective view of another embodiment of the present invention, and FIG. The plan view, FIGS. 5 and 6 are cutaway perspective views for explaining the prior art. 3.11... Light emitting diode, 4, 17... Display sheet, 7, 18... Opening, 10... Display device,
12...First holding member, 13...Second holding member, 1
4... 1 Light diffusion member, 15... Third holding member, 22... Guide hole Agent Patent attorney Kei Nishi Part 1 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] A light source; a first holding member that fixes the light source; a second holding member having an opening that guides light from the light source; a light diffusing member that covers one open end of the opening; a third holding member having a light guide hole that expands toward the downstream side in the traveling direction of the light from the light diffusion member, and an inner circumferential surface of the light guide hole is a reflective surface that reflects the light; A display device comprising: a translucent display sheet disposed at an opening end of the guide hole.