JP2005055794A - Illumination sign - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination sign manufacturable inexpensively by making a positional relation of a pattern of a transmitted light adjusting sheet or a positional relation of the sheet to a light source simple, with structure easy in maintenance by easily removing attraction of dust by static electricity. <P>SOLUTION: The linear light source 2 is provided in a box type housing 1 having an opening part 1a on at least one face. A light reflection member 7 of total reflection or partial reflection, transmitting part of light and reflecting other light is provided on an opposite face of the opening part of the light source 2. A fixing means 8 detachably fixed to the light source or light reflection member 7 is provided on the opening part side of the light source 2. A roughly flat transmitting light adjusting board 5 is provided having a light reflection film pattern 52 formed so that an area of a light transmitting region 51 is small near the light source and becomes large as leaving from the light source. A light dispersion board 4 is provided on the reverse side of the light source of the adjusting board 5 via a constant space d, and a display panel 3 is provided on the front face side thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric signboard that displays a display panel on which a picture or a character is printed on a transparent film or the like for illumination or illumination from behind. More specifically, the present invention relates to an electric signboard that is easy to manufacture and maintain, and that can easily make a beautiful display with uniform brightness on a display surface even with an existing electric signboard.

  For example, as shown in FIG. 5, an electric signboard used for an advertisement such as a station is a light reflecting case (housing) 102 made of a metal plate or the like as a light source such as a straight tube 101 (hereinafter referred to as a fluorescent tube) of a fluorescent lamp. Several are arranged inside, and the display panel 104 or the like is irradiated through the light diffusion plate 103 or directly. The housing is formed in a box shape whose surface is opened by a metal plate made of, for example, stainless steel or aluminum, and a fluorescent tube 101 or the like is provided therein. A light reflecting material is applied to the inside of the housing so that light from the fluorescent tube can irradiate the display panel 104 provided on the front side without waste.

  There are various sizes of such electric signboards depending on the application. For example, an electric signboard that is generally used for advertising such as a station is about 110 cm × 160 cm and has a thickness of about 110 cm × 160 cm. The size is about 15 to 20 cm, and about 3 to 4 65 W fluorescent tubes are arranged inside. The reason why the thickness cannot be made thinner is that if the thickness is reduced, the distance between the fluorescent tube and the display panel becomes shorter, the display panel near the fluorescent tube becomes brighter, the display panel away from the fluorescent tube becomes darker, and the display panel becomes darker. This is based on the reason that the lamp image appears in the image and the appearance of the display is greatly deteriorated. However, it is said that the interval between the fluorescent tube and the display panel is generally required to be approximately the same as the interval between the fluorescent tubes. In a large electric signboard having a large wattage and a large light source pitch, Even when the thickness is about 20 cm, the distance between the fluorescent tube and the display panel is narrow, and an image of the fluorescent tube appears and a beautiful display cannot be achieved.

On the other hand, as shown in FIG. 6, a special dimming lamp cover 105 provided with a light-shielding film pattern 105b so as to increase the light shielding amount on the side of the display panel such as a fluorescent tube and to reduce the light shielding amount on the side surface side. A signboard light source is known in which the display panel side is made uniform even when the distance between the light source and the display panel is small by covering 101 or the like (see, for example, FIGS. 9 and 10 of Patent Document 1). Further, as shown in FIG. 7, a light transmission region 106a and a light reflection film pattern 106b are formed so that transmitted light is suppressed in the vicinity of the linear light source 101, and the transmitted light increases as the distance from the light source increases. By joining the transmitted light adjusting sheet 106 and the light reflecting sheet 107 adjusted in light at the end, and fixing the light source such as the fluorescent tube 101 to the portion where the transmitted light is suppressed, the light source and the display panel An apparatus for uniformizing a surface light source that uniformly irradiates the entire surface of the display panel with almost no distance is also considered (see, for example, FIG. 1 of Patent Document 1).
JP 2003-123526 A

  As described above, in the method of directly covering the fluorescent tube with the special dimming lamp cover, the top surface (surface facing the display surface side) of the fluorescent tube is shielded, so that the effect of reducing the lamp image can be obtained. However, instead of reusing the reflected light, the brightness of the display panel as a whole is reduced simply by absorbing the light in the bright part of the fluorescent tube and reducing the illuminance (brightness). There is a problem in that the brightness is greatly reduced in the gap portion.

  Further, in a structure in which the transmitted light adjusting sheet and the light reflecting sheet are joined at the ends and a light source such as a fluorescent tube is fixed to a part thereof, if the pattern of the transmitted light adjusting sheet is precisely formed, The entire surface of a large planar light source can be made almost uniform in almost contacted state, and it is effectively used while reflecting the light from the light source by the light reflecting film pattern and the light reflecting sheet provided on the transmitted light adjusting sheet. Therefore, a bright display can be performed without waste, and a very uniform surface light source can be obtained. However, in order to form a light reflection film pattern for adjusting transmitted light, when patterning a reflection film such as Al provided on the entire surface, an attempt is made to form a mask by graphic printing or the like that is inexpensive and suitable for mass production. Problems such as printing misalignment occur, an accurate pattern cannot be formed, and a uniform surface light source cannot be obtained unless a light source is arranged at the center line of the pattern. On the other hand, if a transmitted light adjusting sheet is formed with an accurate light reflecting film pattern and a light source is arranged at an accurate position, there is a problem that it becomes expensive.

  Furthermore, if a fluorescent tube or the like is used as a light source, dust is attracted by static electricity and adheres to the light reflecting sheet and the light reflecting ability is reduced, but the transmitted light adjusting sheet and the light reflecting sheet are attached at the ends. Therefore, there is a problem that cleaning is difficult and maintenance is difficult. In addition, electric signboards are often installed outdoors, and the adhesion of dust due to static electricity becomes a serious problem.

  Furthermore, to improve the appearance of existing electrical signs, even if the depth of electrical signs can be extremely shortened, the existing case must be changed, so a surface light source that can be made extremely thin can be used. Even if the homogenizing device is used, there is not much meaning in the conventional housing. On the other hand, as described above, the conventional electric signboard does not have a sufficient space between the original light source and the display panel, and further, the display quality cannot be secured due to the space. The depth of the electric signboard is made small while sacrificing, and the brightness uniformity of the display panel is not obtained. For this reason, an image of a fluorescent tube appears, and there is a great demand for displaying the display panel with a uniform brightness while using the housing as it is.

  The present invention has been made in view of such a situation, and can be manufactured at a low cost without making the positional relationship between the transmitted light adjustment sheet pattern and the transmitted light adjustment sheet and the light source too severe, and due to static electricity or the like. An object of the present invention is to provide an electric signboard having a structure that is easy to maintain, such as easily removing dust.

  Another object of the present invention is to provide an electric signboard having a structure that can easily improve the display quality of an existing electric signboard, such as removing a light source image with an existing electric signboard.

  The electric signboard according to the present invention is provided on a surface opposite to one of the openings of the light source, a light source provided in the housing, a box-shaped housing having openings on one surface or both opposing surfaces, There is a partially reflecting light reflecting member that reflects or transmits part of light and reflects other light, and a fixing means that is provided on the opening side of the light source and is detachably fixed to the light source or light reflecting member. And a substantially flat transmission light adjusting plate having a light reflection film pattern formed so that the light transmission area is small in the vicinity of the light source and the light transmission area increases as the distance from the light source increases. The light diffusing plate is provided on the opposite side of the light source via a certain gap, and the display panel is provided on the surface side of the light diffusing plate.

  Here, the transmitted light adjustment plate suppresses transmitted light near the light source, and a light reflection film pattern is formed on the transparent substrate so that the transmitted light increases as the distance from the light source increases in the horizontal plane, or the reflectance is high. A light transmission region is formed by punching a metal plate by punching etc., and the light reflected by the light reflection film pattern etc. is repeatedly reflected between the light reflection member provided on the opposite surface with respect to the light source, It means what can be irradiated almost uniformly in the plane from the surface side while being used effectively. The transmitted light adjusting plate preferably has a thickness of about 1 mm, for example. However, the transmitted light region is not directly formed on the plate-like body, and the sheet on which the light reflecting film pattern is formed is plate-shaped. It may be affixed to a transparent plate, or a frame-like portion may be affixed around a transparent sheet on which a light reflecting film pattern is formed to maintain flatness.

  The light reflecting member may be a light reflecting sheet having a high reflectivity, a metal plate having a high reflectivity such as an Al plate, a metal oxide such as alumina, a light reflecting film pattern provided on a transmitted light adjusting plate, a light reflecting This includes the inner wall of the housing that is easily reflected by a metallic material or paint.

  If the means for fixing the transmitted light adjusting plate is a fitting member made of a spring plate or wire that matches the shape of the light source, it is preferable because it can be easily attached to an existing electric signboard.

  According to the present invention, since a constant gap of, for example, about 10 mm or more is provided between the transmitted light adjusting plate and the light diffusing plate, even if the light reflecting film pattern of the transmitted light adjusting plate is not strictly formed, Further, even if the relative position between the transmitted light adjusting plate and the light source is not strict, a very uniform display can be achieved by diffusion of light in the gap and diffusion of light in the light diffusion plate. In addition, since the transmitted light adjusting plate is provided, it is possible to uniformly irradiate the surface side while reflecting the light of the light source without waste, and if the constant gap is about 10 mm, the surface can be made sufficiently uniform. . Therefore, it is possible to obtain a very thin (shallow depth) electric signboard without forming a strict light reflection film pattern or strictly assembling the relative position between the transmitted light adjusting plate and the light source. That is, in an electric signboard without a transmitted light adjusting plate having a conventional structure, the distance between the light source and the light diffusing plate needs to be 150 mm. Therefore, the total thickness is about 200 mm. Even if the thickness of the tube is about 30 mm, it can be formed to a thickness of about 50 mm as a whole.

  Furthermore, according to the present invention, the transmitted light adjusting plate can be detachably attached to the light source or the light reflecting member. Therefore, even in an existing electric signboard, the surface can be easily adjusted by fitting the transmitted light adjusting plate into a fluorescent tube or the like. The brightness of the inside can be made uniform, and a very beautiful display can be achieved without reflecting the image of the light source. That is, in the conventional structure, as described above, the distance between the light source and the light diffusion plate is required to be 150 mm or more. However, when the interval between the fluorescent tubes serving as the light sources is wide, the luminance of the display surface is uniform. In addition, they are formed at a narrow interval at the expense of display characteristics to some extent due to space, and the brightness of the display surface is not uniform and the display image is often not clean. Even in such a case, it is possible to display the image with uniform brightness simply by fitting the transmitted light adjusting plate into the fluorescent tube or the like.

  As described above, it is not necessary to form a strict reflecting film pattern, and it is not necessary to strictly match the relative positional relationship between the transmitted light adjusting plate and the light source, so that it can be manufactured very easily. In addition, while being manufactured at low cost, it is possible to obtain an electric signboard that is much thinner than the conventional structure, has a uniform display surface, and has a beautiful brightness. Furthermore, even with an existing electric signboard, it is possible to make the display surface uniform brightness and to make the display screen very beautiful by simply fitting the transmitted light adjusting plate. In addition, since the transmitted light adjustment plate can be easily attached and detached, even if dust adheres due to static electricity or the like, the transmitted light adjustment plate can be removed and cleaned, facilitating maintenance.

  Next, the electric signboard according to the present invention will be described with reference to the drawings. The electric signboard according to the present invention is shown in FIG. 1 in a state where the display panel or the like according to the embodiment is removed, a sectional view taken along the line BB in FIG. As described above, a linear (bar-shaped) light source 2 is provided in a box-shaped housing 1 having an opening 1a on at least one surface. Then, on the surface opposite to the opening 1 a of the light source 2, there is provided a light reflecting member 7 that reflects the entire surface or partially transmits light and reflects other light, and on the opening 1 a side of the light source 2, It has fixing means 8 that is detachably fixed to the light source 2 or the light reflecting member 7 so that the area of the light transmission region 51 is small in the vicinity of the light source 2 and the area of the light transmission region 51 increases as the distance from the light source 2 increases. A substantially flat transmission light adjusting plate 5 on which the light reflecting film pattern 52 is formed is provided. A light diffusing plate 4 is provided on a side opposite to the light source 2 of the transmitted light adjusting plate 5 with a predetermined gap d, and a display panel 3 is provided on the surface side thereof. A transparent cover 6 that protects the display panel 3 is provided on the surface of the display panel 3.

  As the housing 1, for example, a metal plate such as aluminum or stainless steel having a thickness of about 1 mm can be used, but a cardboard or a number of papers having a thickness of about several mm (for example, 3 mm) are bonded together. It can also be formed from composite paper. A magnitude | size can be made into a desired magnitude | size by a use. That is, when a large one is required, an electric signboard having a desired length can be obtained by arranging a number of light sources such as fluorescent tubes in parallel. In the example shown in FIG. 1, the housing 1 is formed as a single unit. However, a portion for fixing the light diffusing plate 4, the display panel 3, or the like may be a mounting structure using fittings or screws. The light diffusing plate 4 of the housing 1 can be attached to be openable and closable with a hinge. The thickness of the housing 1 is such that the thickness of the fluorescent tube as the light source 2 is about 30 mm, the distance d between the transmitted light adjusting plate 5 and the light diffusing plate 4 is about 10 mm, and the light diffusing plate 4 is several mm. In the case of thinning, the thickness can be formed as a whole at about 50 mm. In addition, when repairing the existing electrical signboard etc., when the above-mentioned space | interval d is enlarged, it does not matter how much.

  The light source 2 can use a normal rod-shaped fluorescent tube as the simplest example. If it is a fluorescent tube, there are various standard products from 6 W (length 210 mm) to 110 W (length 2367 mm), and a light source having a necessary size according to the size of the display panel 3 to be displayed and the desired brightness. 2 can be arranged at a necessary interval. Note that the light source 2 is not limited to a fluorescent tube, and a linear (bar-shaped) light source 2 such as another cold cathode or between hot cathodes or a linear arrangement of LEDs can be used. For example, when a fluorescent tube is used, as shown in FIG. 1, the fluorescent tube is fixed by being fitted into a socket 21 attached to the housing 1, and an inverter, a ballast, a glow bulb, etc. that drives the fluorescent tube are used. Although not shown, they are collectively fixed to the side wall of the housing 1 with an adhesive tape or the like.

  The display panel 3 is a transparent film sheet on which images to be displayed such as characters and figures are printed in color, etc., and is displayed vividly when illuminated by illumination from the back side. The light diffusing plate 4 is made of a plate-like body such as an acrylic resin (PMMA), polyethylene terephthalate (PET), polycarbonate (PC), milky white glass or the like having a thickness of about 3 mm, which is called milk half. It is provided to spread in all directions. The light diffusing plate 4 is preferable because the thicker one can make light having no directivity even in the oblique direction coming from the lower surface. However, if the light unevenness is small, a light diffusing sheet such as a thin vinyl sheet (FF sheet). Or a milky white sheet may be sufficient. On the surface side of the display panel 3, a transparent cover 6 made of an acrylic plate or a glass plate for protecting the display panel 3 or having a thickness of about several millimeters is fixed to the housing 1 or the like, for example.

  The transmitted light adjusting plate 5 is made of a transparent sheet made of, for example, polyethylene terephthalate (PET) having a thickness of about 100 μm, and the transmitted light adjusting sheet having a transmitted light adjusting pattern formed thereon is heat resistant such as polycarbonate having a thickness of about 1 mm. It is formed by attaching to a transparent and transparent substrate. The transmitted light adjusting sheet is formed, for example, by providing a light reflecting film made of Al or the like on the entire surface of PET by vacuum deposition or the like, and removing a part of the light reflecting film by etching or the like. For example, as schematically shown in FIG. 1A, the area of the light transmission region 51 is small in the vicinity of the light source 2, and the area of the light transmission region 51 increases as the distance from the light source 2 increases. Thus, the light-transmitting region 51 is formed, and the light-reflecting film remains as it is in the part that is not removed, and remains as the light-reflecting film pattern 52 (in the drawing, the light-transmitting region 51 is shown in a circle and adjacent to the outside of the circle) The portion between the circles is a light reflecting film pattern 52).

  Although schematically shown in FIG. 1, the light transmission region 51 is actually formed in a very fine pattern. Thus, the sheet | seat in which the transmitted light was adjusted is partially affixed on the heat-resistant transparent substrate, such as a polycarbonate, as above-mentioned by the ultrasonic wave etc., for example.

  As shown in this example, if a reflective film pattern is formed on a transparent sheet, a mask for etching an Al film formed on the entire surface can be formed by graphic printing or the like, and mass production is very simple. This is preferable. However, even if it is not such a structure, the light transmission area | region 51 becomes large as it distances from the light source 2, and it is formed in the pattern that a substantially uniform light irradiation is performed on the surface side, and the light provided in the back side It is only necessary to irradiate light uniformly from the surface while repeating reflection with the reflection sheet 7. For example, the light transmission region 51 may be formed by punching on a metal plate having excellent light reflectivity such as Al. A transparent light adjustment pattern may be directly formed on a thick transparent substrate such as PET. Further, the shape of the light transmission region 51 is not limited to a circle, and may be a rectangle or a slit. Further, the reflective film pattern may be formed in a circular shape or the like on a transparent sheet by white silk printing or white ink jet printing. In short, it is only necessary to form a pattern in which light is irradiated as uniformly as possible from the surface.

  In the example shown in FIG. 1, the transmitted light adjusting plate 5 is attached to each light source 2 in a substantially abutting manner, but the transmitted light adjusting plate 5 is not necessarily formed on the entire surface. There is no need. That is, since the light becomes weaker toward the end portion, the area of the light transmission region of the transmitted light adjusting plate 5 also becomes larger. However, even if the end portion is almost the entire light transmission region, a constant gap d is provided. Therefore, non-uniformity is alleviated by light diffusion. Therefore, even if it is not a strict transmitted light adjustment pattern, substantially uniform irradiation can be performed, and the end of the transmitted light adjustment plate 5 may not be provided. For example, when the interval between the light sources 2 is about 300 mm, the transmitted light adjusting plate 5 may have a width of about 100 mm and a width of about 200 mm.

  The transmitted light adjusting plate 5 is provided with a fixing means 8 for fixing to the light source 2 or the like. In the example shown in FIG. 1, the fixing means 8 is formed by a metal fitting 80 fitted to the metal ring portions at both ends of the fluorescent tube. That is, a fixed portion 82 to the transmitted light adjusting plate 5 is provided together with a fitting portion 81 having an inner diameter slightly smaller than the outer diameter of the fluorescent tube 2 by a plate spring having a spring property. In the example shown in FIG. The fixing portion 82 is fixed to the stopper 83 with a screw 84, and the stopper 83 is firmly fixed to the transmitted light adjusting plate 5 with another screw 85. As described above, since the metal fitting 80 having the fitting portion 81 is attached to the transmitted light adjusting plate 5, the transmitted light adjusting plate 5 can be easily obtained simply by fitting the fitting portion 81 into the metal ring portion of the fluorescent tube. Can be fixed.

  When the width of the transmitted light adjusting plate 5 (the length in the direction perpendicular to the direction of the linear light source 2) is large, the both ends may not be supported by simply fixing to the light source 2. In such a case, as shown in FIG. 1, an appropriate number of support members 86 are provided along the longitudinal direction of the linear light source 2 on the light reflecting plate 7 or the housing 1 or on both ends of the transmitted light adjusting plate 5. By forming it, the transmitted light adjusting plate 5 does not hang down at both ends, and a plane can be maintained. As the support member 86, a plastic material that transmits light can be used.

  When fixing at a portion that does not emit light, such as a metal ring portion of a fluorescent tube, there is no fear of light shielding, so it is preferable because it can be firmly fixed with a solid metal fitting such as a leaf spring. However, when the fluorescent tube is long and there is a risk of bending in the tube axis direction of the fluorescent tube, or when the metal ring portion of the light source 2 is small, when a solid metal fitting cannot be fitted, FIG. As shown, a metal fitting 89 having a fitting portion 87 that is fitted into the light source 2 with a wire having a spring wire diameter of about 1 mmφ can be used. In the example shown in FIG. 2, the metal fitting 89 is only inserted into the through hole of the transmitted light adjusting plate 5 and has no fixed portion. Therefore, the fitting portion 87 is fitted into the light source 2 or removed from the light source 2. An operation unit 88 is formed to facilitate the operation. By forming the fixing means 8 with such a thin metal fitting, the transmitted light adjusting plate 5 can be fixed without blocking light even when the light emitting portion of the light source 2 is used for fixing.

  Further, the fixing means 8 is not limited to means for fixing to the light source 2. That is, as will be described later, when the light reflecting member 7 is made of a light reflecting plate or the like and is bent in an oblique direction at the end portion, the end portion of the transmitted light adjusting plate 5 is moved as shown in FIG. By bending, the bent portion 5 a can be fitted and fixed to the bent portion 7 a of the light reflecting member 7. In this case, the bent portion 5a serves as a fixing means.

  As described above, the light reflecting member 7 reflects the light emitted from the light source 2 and emits it from the light transmitting region 51 of the transmitted light adjusting plate 5. The light reflecting member 7 does not absorb light and has as high a light reflectance as possible. Is preferred. For example, the product name MCPET (ultrafine foamed light reflecting plate) manufactured by Furukawa Electric Co., Ltd. is preferable because it has a thickness of about 1 to 2 mm and has heat resistance and mechanical strength. For example, a product name E60 manufactured by Toray Industries, Inc. (polyester foam sheet having a thickness of about 180 μm) is backed with an Al plate having a thickness of about 0.3 mm, Al or Ag is deposited on the surface of a metal sheet or a resin sheet. A mirror finished product can be used in the same manner. Furthermore, even if such a special reflective sheet is not used, it is possible to make reflection easier by using a metal plate having a high reflectivity, making the inner wall of the housing a smooth surface, or applying a reflective paint to the inner wall. It can also be used as a reflecting member.

  When the pitch (interval) of the light source 2 is large, for example, 300 mm or more, and the end of the transmitted light adjusting plate 5 is separated from the light source 2, the light reflecting member 7, as shown in FIG. It is preferable that the bent portion 7a is formed by bending the end portion from the viewpoint that the light from the light source 2 can be used effectively. That is, the light escapes easily at the end side of the transmitted light adjusting plate 5 and the amount of light tends to decrease, but the light from the light source 2 can be effectively used by providing the bent portion 7a. As described above, the end portion of the transmitted light adjusting plate 5 can be removed while forming the bent portion 7a. By doing so, the fall of the light quantity by the edge part side can further be supplemented. In addition, if the reflection member 7 is plate shape, the edge part can be bent, but when it is not plate shape, a trapezoidal reflector can also be mounted.

  The light reflecting member 7 is not limited to the one that reflects almost the entire surface for the purpose of reflection as described above. For example, the light reflecting film pattern 52 of the transmitted light adjusting plate 5 may be used as a reflecting member. it can. That is, in the case of an electric signboard having both sides as display surfaces, the transmitted light adjustment plates 5 are provided on both sides with the light source 2 interposed therebetween, so that reflection is performed by the light reflection film patterns 52 of both transmitted light adjustment plates 5. While repeating, light is emitted from any one of the light transmission regions 51 of the transmitted light adjustment plate 5, and uniform irradiation can be performed on both sides. That is, one light reflecting film pattern of the transmitted light adjusting plate 5 acts as a light reflecting member 7 for the other transmitted light adjusting plate 5. As described above, the light reflecting member 7 repeats reflection of light with the transmitted light adjusting plate 5 so that the light irradiated from the light transmitting region 51 is substantially uniform in the plane while repeating reflection between them. Is provided.

  According to the present invention, since the transmitted light adjusting plate can be detachably fixed to a light source such as a fluorescent tube or a reflecting member, the transmitted light adjusting plate can be easily attached even with an existing electric signboard. The display panel can be irradiated uniformly. In addition, since a fixed gap is provided between the transmitted light adjusting plate and the light diffusing plate, the transmitted light adjusting plate can be adjusted even if the light reflecting film pattern of the transmitted light adjusting plate is not strictly formed. Even if the positional relationship between the plate and the light source is not strictly matched, light is diffused in the gap and further diffused by the light diffusing plate, so that the brightness is very uniform in the plane. In addition, since the transmitted light is adjusted by the transmitted light adjusting plate so that the transmitted light is substantially uniform, the gap portion can be made uniform at a very narrow interval of about 10 mm, which is the same as a conventional electric signboard. There is no need to open a large space. On the other hand, even if the gap is wide, the light diffusion space is widened and is only made more uniform, so even with existing electric signboards, the display panel can be made very uniform simply by fitting the transmitted light adjustment plate. Can be irradiated.

  The present invention can be used as a billboard for advertisement in a station or a public place, and as a billboard for an exhibition or a show in a room.

It is a figure explaining one Embodiment of the electrical signboard by this invention. It is a figure which shows the other structural example of the fixing means shown by FIG. It is a figure which shows the other structural example of the reflection member shown by FIG. It is a figure which shows the other structural example of the fixing means shown by FIG. It is a figure explaining the structural example of the conventional electrical signboard. It is explanatory drawing of the example which suppresses the abnormal light emission near a light source in the conventional electrical signboard. It is a figure explaining an example of the equalization apparatus in the conventional planar light source.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Light source 3 Display panel 4 Light diffusing plate 5 Transmitted light adjusting plate 7 Light reflecting member 8 Fixing means

Claims (2)

  A box-shaped housing having openings on one side or on opposite sides, a light source provided in the housing, and provided on a surface opposite to the one of the openings of the light source, totally reflecting or partially transmitting light. And a partially reflecting light reflecting member that reflects other light, and a fixing means that is provided on the opening side of the light source and is detachably fixed to the light source or the light reflecting member. A substantially flat transmission light adjusting plate on which a light reflection film pattern is formed so that the transmission area is small and the light transmission area increases as the distance from the light source increases; An electric decoration signboard comprising a light diffusing plate provided through a gap and a display panel provided on the surface side of the light diffusing plate.   The electric signboard according to claim 1, wherein the means for fixing the transmitted light adjusting plate is a fitting member made of a plate material or a wire having a spring property matching the shape of the light source.

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