JPS62187381A - Lighting plate - 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 lighting board used in connection with advertising boards and lighting stands 2, such as drawing boards used in the graphic industry or by draftsmen.

BACKGROUND OF THE INVENTION In conventional lighting panels, the light source is simply covered by a front panel that is opalescent enough to hide the shape of the light source.

Specifically, compared to the currently used store display board structure which utilizes a front panel with a light transmittance of 25-5 mm%, the present invention uses a front panel with a light transmittance of 75X. can be used.

Problems to be Solved by the Invention It is an object of the present invention to reduce the energy consumption of illuminated surfaces such as advertising boards, traffic signal boards, 9 lighting boards such as drawing boards, and store display boards compared to conventional structures. The goal is to reduce the volume and make it less bulky.

Means for Solving the Problems Regarding the Lighting Board, etc., Consisting of One or Several Light Sources and a Front Panel 2. The structure solved by the present invention has a transparent, substantially rectangular wedge-shaped board. The wedge plate has two substantially triangular faces, a front side, a back side, and a wide end, and the one or more light sources are located at the wide end of the wedge plate. A milky white front panel covers the front surface and a light reflective rear panel covers the rear surface of the wedge plate.

"Milk white" should be understood as "milk color". Board manufacturers usually use front panels that are opalescent to some degree. Highly opalescent means lowly transparent.

Operation In the present invention, not only is it not necessary to hide the light source by selecting a panel with a high degree of opalescence and therefore high light energy loss, as in the prior art, but the thickness of the illumination plate is reduced by the thicker side of the wedge-shaped plate. It can be made small so as to correspond to the end face (thick width end face) of the light source or the end face of the light source.

As a result of experiments, υ
It has been found that a particularly desirable lighting panel can be obtained: The reflective rear panel provides light diffusion and is preferably white in color; The front and rear panels are parallel to each other with a spacing of about 5 squares on each side. The light # is arranged on a line parallel to the longitudinal axis of the thick end face of the wedge-shaped plate; Preferably, an arc tube is used as the light source. This is because the entire thickness and width end face of the wedge-shaped plate can be illuminated optimally.

The light source should be blocked from the outside so as to illuminate only the thick end face of the wedge-shaped plate; the light source should be provided at the edge of the rear panel configured to have a U-shaped profile to block the light source. is advantageous. The power source is preferably from a public current source.

The wedge angle of the wedge plate is 1-4 degrees, preferably about 2.
It's 5 degrees.

Effects of the Invention The structure of the present invention allows the front plate to be selected so that substantially all of the light from the light source is not lost and has a low opalescent appearance, i.e. the front plate is highly transparent to reduce light loss. A lighting board is provided.

Embodiment To explain the present invention with reference to the drawings, FIG. 2 shows a lighting board according to the present invention. This lighting board is rectangular.

Transparent wedge-shaped plate 3. Milky white surface panel 2. and a reflective rear panel 4 with a preferably white light source 5 in the form of an arc tube projected onto the U-shaped profile 1.

The wedge-shaped plate 3 may be made of acrylic and in one embodiment has dimensions of 15 mm x 5 mm.

The thickness or width of the shoulder surface (thick end surface) 9 on the side adjacent to the light source 5 is about 26 m.

The thickness of the end surface of the wedge-shaped plate on the side opposite to the light source, on the side of the apex of the triangle, was 21 ml. The arc tube or light source 5 is arranged parallel to the cross section of the thicker (i.e. adjacent to the light source) side 9 of the wedge plate 3. Figure 3, in which the wedge-shaped plate and the different surface panel are omitted, shows the current connection state, and is designated by number 7.
is a coil, and 8 is a starter (switch). The coil and starter may be arranged behind the reflective panel 4, but they can also be arranged outside this lighting panel.

The optical characteristics of the illumination plate according to the present invention will be explained below.
do.

FIG. 4 is a side view of the wedge-shaped plate 3 having the front panel 21, the reflective back plate 4, and the light source 5.

When a light ray is projected from the light source 5 in the thickness direction of the end face 9 of the wedge-shaped plate, the light ray is reflected in a direction that increases the incident angle and the declination angle because the wedge-shaped plate has an angle, and the light passes through the front or rear surface. Emerging from the wedge-shaped plate. Considering ray A, the ray is reflected at the end surface, passes through the paper surface of the wedge-shaped plate, is reflected at the rear surface of the reflection, passes upward through the wedge-shaped plate and hits the front panel, and the front panel is thus illuminated. be done. Rays B and C are other examples of rays that hit the bottom of the wedge plate, point upward, reflect at the top, reflect again, and finally pass through the top and hit the front panel. The panel is thus illuminated.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the lighting board according to the invention, the two dimensions being 1.5 meters x 0.5 meters; FIG. 2 is a side view of the lighting board according to the invention; FIG. 3 is a plan view showing one embodiment of the current source (arc tube); FIG. 4 is an optical path diagram of a wedge-shaped plate, a front panel, and a reflective rear panel; and FIG. 5 is a rectangular wedge with a front panel and a reflective rear panel. FIG. In the figure, number 1 is a U-shaped contour body for blocking the light emission of 1 arc tube, 2 is a milky white front panel, 3 is a wedge-shaped plate, 4 is a reflective rear plate, 5 is a light source, 7 is a coil, 8 is a starter, 9
is the thick end face of the wedge-shaped plate. Franz

Claims (1)

[Scope of Claims] 1. A lighting board for use in a lighting stand, such as a signal board or a drawing board, having one or several light sources (5) and a front panel (2), wherein the lighting board is substantially a rectangular transparent wedge-shaped plate (3), said wedge-shaped plate has two substantially triangular faces and has a front face, a rear face and a thick end face (9); Alternatively, several light sources are provided at the thick end faces of the wedge-shaped plate, a milky white front panel (2) covers the front face, and a light reflecting rear panel (4) covers the rear face of the wedge-shaped plate. Board. 2. The illumination plate according to claim 1, characterized in that the reflective rear panel (4) diffuses light rays. 3. The lighting board according to claim 1 or 2, wherein the reflective rear panel (4) is white. 4. The panel according to any one of claims 1 to 3, wherein the panels (2 and 4) are arranged parallel to the front and rear surfaces of the wedge-shaped plate and spaced apart from them by about 5 mm. lighting board. 5. Claims 1 to 4 in which the light source is provided on a line parallel to the longitudinal axis of the thickness end surface (9) of the wedge-shaped plate
The illumination plate according to any one of paragraphs. 6. Claim 1 in which the light source is blocked from the outside so as to illuminate only the thick end face (9) of the wedge-shaped plate
The illumination plate according to any one of items 1 to 5. 7. Illumination plate according to any one of claims 1 to 6, wherein the wedge angle of the transparent wedge-shaped plate (3) is 1-4 degrees, preferably about 2.5 degrees.