JP2014056093A - Internally-illuminated standing signboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internally-illuminated standing signboard which has a thin advertisement display part preferable in appearance, which achieves the mitigation of poor handleability due to the heavy weight of the signboard itself, and which is convenient in terms of not requiring a power cord during the charge of a storage battery for supplying power to a light source.SOLUTION: An internally-illuminated standing signboard 2 includes a display 3 having a surface emitting body 5, and a battery storage part 4 in which a lithium ion battery 8 for an electric power-assisted bicycle is detachably stored. The surface emitting body 5 is formed of a unit made by covering a plurality of electrically-connected wide-angle emitting LED chips 6 arranged on a PET film (film-shaped base material) in a grid pattern (e.g. 37.5 mm spacing of vertical and horizontal) with a polyvinyl chloride film (transparent plastic film) from above. The lithium ion battery 8 is used as the power for a light source of the surface emitting body 5.

Description

  The present invention relates to an internal illumination type and stand type signboard that includes a surface light emitter on which an LED chip is disposed and uses a lithium ion battery as a power source for a light source.

  An internally-lit stand signboard used for advertising in the street often uses a fluorescent lamp as a light emitter (Patent Document 1), and in that case, an advertisement display part (an electric signboard part) incorporating a fluorescent lamp. (For example, about 200 mm in thickness), and as a result, the appearance directly connected to the advertising effect is not excellent, and the signboard as a whole becomes heavy, so that the handleability is poor when an operator works alone. Conceivable. Whether or not a single worker can be transported and installed without any particular difficulty seems to be a trivial matter, but in recent years, with the declining birthrate and aging, it is an important and urgent problem.

  On the other hand, in recent years where energy saving is required, three or four LED chips are arranged on a substrate and electrically connected to one unit (one unit, so-called modularization). There are also known signboard products that use as a light emitter. However, such a product uses the “light emitter composed of a unit in which a transparent plastic film is coated on a wide-angle light-emitting LED chip that is arranged and electrically connected in a grid pattern” in the present invention. However, in order to make the surface illuminance of the advertisement display portion with the built-in illuminant uniform, the thickness of the advertisement display portion needs to be considerably large (for example, about 200 mm).

  Furthermore, although the signboard of Patent Document 1 describes that the battery built in the base is used as the power source, the power cord for charging the battery is provided. It was inconvenient in that it was necessary to carry the entire signboard to the middle and upper floors of the store and other places where there was a fixed power supply facility.

JP 2003-66876 A

  In view of such a conventional technique, the present invention has a thin advertisement display portion and a good appearance, reduces bad handling due to the heavy signboard, and further provides a storage battery for supplying power to a light source. It was made to provide an internally illuminated stand signboard that does not require a power cord when charging.

That is, the present invention
[1] An internally illuminated stand signboard having a display unit provided with a surface light emitter and a battery storage part in which a lithium ion battery is detachably stored, and the surface light emitter is placed on a film-like substrate. It is composed of a unit in which a transparent plastic film is coated on a wide-angle light emitting LED chip that is arranged in a grid and electrically connected, and the lithium ion battery is a lithium ion battery for medium power An internally illuminated stand signboard characterized by being a power source for a light source of the surface light emitter,
[2] A light emission angle of 20 to 250 of the surface light emitters arranged in a grid pattern with the same interval in the range of 20 mm to 50 mm on the film-like substrate and electrically connected thereto is 100 ° to 120 °. An internally illuminated stand signboard according to the above [1], comprising a unit in which a transparent plastic film is coated on an LED chip that is
[3] The internally illuminated stand signboard according to [1] or [2], wherein the display unit is formed of a box-shaped body having a front plate, a horizontal member, and a back plate.
[4] The internally illuminated stand signboard according to [3], wherein a distance between a surface of the surface plate and the LED chip of the surface light emitter is about 25 mm to about 60 mm,
[5] The internal illumination type according to any one of [1] to [4], wherein the medium power lithium-ion battery is a battery that can be used in any of an electric tool, an electric motorcycle, and an electric assist bicycle. Stand signboard,
[6] The internally illuminated stand signboard according to any one of [1] to [5], wherein the medium power lithium ion battery is a lithium manganate battery,
[7] The internally illuminated stand signboard according to any one of [1] to [6], wherein the medium power lithium ion battery is a laminate type, and
[8] The internally illuminated stand signboard according to any one of [1] to [7], wherein the medium power lithium ion battery has a mass of less than 6.5 kg,
About.
The present invention has the following effects by such a configuration.

According to the first aspect of the present invention, a unit in which a transparent plastic film is coated on a wide-angle light emitting LED chip arranged in a grid pattern on a film substrate is used as a surface light emitter. It is possible to reduce the thickness of the display part, which makes it possible to reduce the weight of the display part, and is lighter if it has the same electric capacity compared to other storage batteries such as lead storage batteries. Therefore, the overall weight of the internally illuminated stand signboard can be reduced.
Moreover, since the unit using the LED chips arranged in a large number in the grid pattern is a surface light emitter, the display surface can be illuminated uniformly, and the characters represented on the display unit are directly connected to the advertising effect. In addition to improving the appearance of the picture and the pattern, the power consumption is low, the energy is saved, and the life is long compared to the case where the light source is a fluorescent lamp.
In addition, the medium power lithium-ion battery is detachably housed in the battery compartment, so there is no need for a power cord to connect to a fixed power supply when charging, and there is a signboard where there is a fixed power supply facility. In addition to being convenient in that it does not need to be transported as a whole, it is also convenient for charging using inexpensive late-night power in a social environment that requires power saving in many fields in recent years.

  According to the second aspect of the present invention, since the grid grid content, the number of LED chips, and the light emission angle are specified, the thickness of the display unit is reduced, and the weight of the display unit is thereby reduced. Thus, the effect of the invention of claim 1 can be more reliably achieved in that it can be reduced and the surface of the display unit can be illuminated uniformly.

  According to invention of Claim 3, since a display part consists of a box-shaped body which has a surface plate, a horizontal member, and a back surface board, thickness of a display part is made thin, and thereby The effects of the invention of claim 1 or 2 can be more reliably achieved in that the weight can be reduced and the surface of the display unit can be illuminated uniformly.

  According to the invention described in claim 4, since the distance between the surface plate surface and the LED chip of the surface light emitter is about 25 mm to 60 mm, it is thin and can uniformly illuminate the surface of the display portion, so that it looks good. It is possible to provide an internally illuminated stand signboard that has an excellent advertising effect.

  According to the invention described in claim 5, since the lithium ion battery for medium power is a battery that can be used for any one of an electric tool, an electric motorcycle, and an electric assist bicycle, the reliability of the battery with respect to an outdoor use environment. It is possible to provide a highly illuminated interior stand signboard.

  According to the sixth aspect of the present invention, since the medium power lithium ion battery is a lithium manganate battery, an internally illuminated stand signboard that is advantageous in that an inexpensive and excellent safety battery is used. Can be provided.

  According to the seventh aspect of the present invention, since the medium power lithium-ion battery is a laminate type, an internally illuminated stand signboard that is advantageous in that it uses a battery that is advantageous in terms of heat dissipation and mounting density. Can be provided.

  According to the eighth aspect of the invention, since the medium power lithium ion battery housed in the battery housing portion has a mass of less than 6.5 kg, the surface light emitter provided in the display portion is a film-like substrate. Since the unit is formed by coating a transparent plastic film on wide-angle light emitting LED chips arranged in a grid pattern on a material and electrically connected, the thickness of the display unit is reduced and Accordingly, in combination with the fact that the weight of the display unit can be reduced, it is possible to provide an internally illuminated stand signboard that is reduced in weight as the entire signboard.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of this invention, (a) is a front view of the internally illuminated stand signboard in which a part of the surface plate is broken, and (b) is an internally illuminated stand signboard in which only the display unit is shown in a conceptual cross section. FIG. It is the longitudinal cross-sectional view which abbreviate | omitted one part of the surface light-emitting body used for this invention. FIG. 2 is a conceptual vertical sectional view of an upper part of the display unit in FIG. 1, with a part of the lower part omitted.

  The present invention relates to an internally lit stand signboard used for advertising and the like on the street, in front of a store, on the street, etc., and the height of the product is usually about the height of children to adults.

The outline of the configuration of the internally illuminated stand signboard of the present invention includes a display unit provided with a surface light emitter and a battery storage unit in which a lithium ion battery is detachably stored.
The film-like base material used for the surface light emitter means a base material made of a film or a sheet, and the material thereof is preferably plastic in terms of workability, among which heat resistance, light resistance, mechanical Polyester, polyvinyl chloride, etc., which are excellent in properties and the like, are preferable.

  The wide-angle light-emitting LED chips disposed on the film-like substrate preferably have the same light emission angle in the range of 100 ° to 120 °, and the shape is a planar round shape or a square surface mount type (SMD type). Is preferred. The number of arrangement is preferably 20 or more from the normal size of the internally illuminated stand signboard. Further, it is preferable that 20 to 250 be one unit and a plurality of units be used if necessary because wiring and mounting can be simplified.

  When the LED chips are arranged in a grid pattern, it is preferable that the LED chips are arranged in a grid pattern with the same interval in the vertical and horizontal directions in the range of 20 mm to 50 mm in order to uniformly illuminate the surface of the display unit. The distance between the outermost LED chip and the end of the surface light emitter is preferably half the distance between the LED chips.

A method for electrically connecting a large number of the LED chips arranged on the film-like substrate is not particularly limited, and first, electric wiring is formed on the film-like substrate. As this method, for example, an appropriate printed wiring is prepared by screen-printing a conductive silver paste in advance on one surface of a film-like substrate, and the printed wiring is pasted so as to be superimposed on the film-like substrate. And a method of laminating a metal foil and etching the metal foil portion, a method of forming a metal thin film by vapor deposition, and the like.
Thereafter, as a method of disposing the LED chip on the film-like substrate on which the electric wiring is formed, a fixing (joining) technique using soldering or an adhesive can be employed.

The surface light emitter used in the present invention is a unit in which a transparent plastic film is coated on a wide-angle light emitting LED chip that is arranged in a grid pattern on a film substrate and electrically connected. . As a material for the transparent plastic film for coating, polystyrene, polyester, polyvinyl chloride, ABS and the like are preferable in terms of excellent mechanical strength, weather resistance, and good workability, and polyvinyl chloride is particularly preferable.
The coating is preferably performed by sufficiently adhering to the outer shape of the LED chip so that no gap is generated between the LED chip and the transparent plastic film. If it is closely coated, air can be prevented from entering through the gap. For this reason, it is possible to prevent fine movement and uneven irregular reflection of the LED chip due to the expansion of air, and to improve the appearance of the surface light emitter.

In the surface light emitter, the surface of the film-like substrate opposite to the LED chip (back side) is stabilized, the workability is improved, and the heat dissipation of the LED chip and the electrically connected circuit is further improved. To increase the thickness 0.4-0.6 through the adhesive layer
An aluminum plate of about mm may be provided.

  When the display part in this invention consists of a box-shaped body which has a surface plate, a horizontal member, and a back plate, the said aluminum plate and a back plate are joined via an adhesive agent (adhesive).

  In the embodiment described later, the display unit according to the present invention is a curved box-like body that is slightly inclined toward the battery storage unit side toward the upper side, but is not limited thereto. The signboard of the present invention is, for example, a rectangular parallelepiped box having a front plate, a pair of horizontal members, and a back plate, which is formed separately from the battery storage unit on a rectangular parallelepiped battery storage unit whose outer shape is rectangular in plan view. The advertisement display part comprised with the body may stand vertically and may be formed.

The distance (denoted by h) between the LED chip of the surface light emitter and the surface plate surface is changed by the arrangement interval (pitch, L) of the LED chip, and the diverging light is evenly distributed on the surface of the surface plate. It is preferable in that it can be diffused and illuminated uniformly.
For example, when the surface mount type (SMD type) LED chip having the same light emission angle in the range of about 100 ° to 120 ° and having a flat square shape is used, and the LED chip pitch L is 37.5 mm The present inventors have confirmed that h can be about 50 mm or less under predetermined conditions, and that L can be about 30 mm or less when L is 25 mm.

The surface light emitter in the present invention is composed of a unit in which a transparent plastic film is coated on a wide-angle light emitting LED chip that is arranged in a grid pattern on a film-like substrate and electrically connected. Thus, the point that the thickness of the display unit can be reduced is difficult to explain theoretically and quantitatively, but will be described in an embodiment described later.
If the thickness of the display portion is reduced, the material constituting the display portion is reduced accordingly. As a result, the mass of the display portion, and thus the mass of the signboard of the present invention is reduced.

In the present invention, a lithium ion battery detachably housed in the battery housing is used as the light source for the surface light emitter. The battery storage unit is usually configured as a separate body from the display unit including the light emitter, but it is not necessarily required to be separated by a face material or the like.
Lithium-ion batteries have high energy density, and in terms of weight energy density, it is said that they can release the same energy with a weight of about 1/5 or less of lead acid batteries and 1/3 of nickel-cadmium batteries. Therefore, if the electric capacity is the same, the weight can be surely reduced and the size can be reduced. Furthermore, the nominal operating voltage of the unit cell is 3.7V, which is higher than that of other storage batteries (the nominal voltage of the lead storage battery is 2.0V), excellent cycle characteristics, no memory effect, and good storage characteristics. Have.
Lithium ion batteries generally use an organic solvent as an electrolyte. However, in the present invention, a lithium polymer battery using a porous polymer containing an electrolyte in the form of a gel or a solid instead of an organic solvent is also used. It is included as a concept of a lithium ion battery.

The medium power lithium ion battery refers to, for example, a lithium ion battery that can be used for an electric tool, an electric motorcycle, or an electric assist bicycle. Small mobile lithium-ion batteries used in notebook computers, mobile phones, portable game machines, digital audio players, digital cameras, etc., large-power lithium-ion batteries used in hybrid cars, plug-in hybrid cars, pure electric cars, etc. It is a concept corresponding to.
The height of the internally illuminated stand signboard according to the present invention is usually about the height of a child to an adult, so that it has a corresponding area and is a power source for a surface light emitter in which a large number of LED chips are arranged as a light source. The capacity of a small mobile lithium ion battery is too small for use as a large power lithium ion battery.

The mass of the lithium ion battery (battery) is variously known from several tens of grams for small-sized mobile phones to slightly less than 1 kg for medium-sized power to over 10 kg for large-sized power and over 100 kg for large-sized power. As the medium power lithium ion battery (assembled battery), a battery having an electric capacity of 2.5 to 30 Ah, a voltage of 3 to 65 V, and a mass of less than 6.5 kg is preferably used.
In the present invention, among lithium ion batteries for electric tools, electric motorcycles, and electric assist bicycles, lithium ion batteries for electric assist bicycles that do not require high output but require a certain capacity are preferably used. In this case, it is preferable that the electric capacity is 2.5 to 20 Ah, the voltage is 3 to 55 V, and the mass is less than 6.5 kg.

A lithium ion battery product uses a carbon material as a negative electrode material, and the positive electrode material is roughly classified into a cobalt type using lithium cobaltate, a nickel type using lithium nickelate, and a manganese type using lithium manganate. The lithium-ion battery for medium power in the present invention is preferably a manganese-based lithium-ion battery because it is inexpensive and excellent in safety.

  In addition, the type of lithium ion battery includes a cylindrical winding type, a rectangular shape in which a laminated body is put in a square can, and a laminated structure in which a negative electrode, a separator, and a positive electrode are stacked in a planar shape. Although there are types, a lithium ion battery for medium power in the present invention is preferably a laminate type that is advantageous in terms of heat dissipation and mounting energy density. Among the laminate molds, an aluminum laminate mold that employs a sheet structure in which aluminum and a synthetic resin are bonded as an exterior material is preferable in that it has high heat dissipation, mounting energy density, long life, and safety.

When the lithium ion battery for medium-sized power has a mass of less than 6.5 kg, the overall mass of the presently lit stand signboard of the present invention whose height is about the height of a child to an adult is generally less than about 40 kg. It becomes easy to suppress, and it is possible to improve the handleability when the worker carries out work such as transportation and installation alone.
On the other hand, according to the Ministry of Education, Culture, Sports, Science and Technology's “2008 Physical Fitness and Motor Ability Survey”, the average grip strength of adult males (20-50 years old) is 44.5-48 kg, and in the 60s 39-42 kg. Most of them are equipped with casters and the shape and height are not fixed. The relationship between the handleability of the internally illuminated signboard and the grip strength of the person who handles it is not generally discussed, but the mass of the internally illuminated signboard is about 40kg. In view of the above, it is considered that there is a certain relationship between the fact that the handling ability when the worker carries out work such as transportation and installation by himself / herself is significantly deteriorated, and the grip strength data.

Embodiments of the present invention will be described below with reference to the drawings. Each drawing conceptually depicts the members and their relationships, and does not necessarily depict the actual object in detail.
FIG. 1A is a front view of an internally illuminated stand signboard 2 in which a part of the surface plate 1 is broken, and FIG. 1B is a side view of the signboard 2 showing only the display unit 3 in a conceptual cross section. FIG.
On the lower side of the display unit 3, a battery storage unit 4 is provided. As shown in (b), the battery storage unit 4 has a curved shape slightly inclined toward the battery storage unit 4 as it goes upward. Is 1535 mm including the caster 20.

The surface light emitter 5 is a light emitter having a unit of 45 cm × 45 cm, and the whole surface light emitter is configured by connecting three pieces vertically. Accordingly, the entire surface area is 0.61 m ² , and 432 LED chips 6 (144 units) are used as a whole.
As the LED chip 6, a surface mount type (SMD type) (NSSW100D, white, manufactured by Nichia Corporation) having a light emission angle (so-called view angle) of about 110 degrees and a planar square shape was used. May be.

In this example, the surface light emitters 5 are approximately 37.5 mm apart in vertical and horizontal intervals between the LED chips 6 and are connected by printed wiring 7 (FIG. 2).
The lithium-ion battery 8 for the electric assist bicycle is stored in a predetermined position of the battery storage unit 4, and the DC power is connected by connecting the battery 8 and the cord 9 of the surface light emitter 5 through the insertion port 10. Can be supplied to the surface light emitter 5. Reference numeral 24 denotes a constant current circuit.

  The battery 8 is an aluminum laminate type using an aluminum laminate sheet as an exterior material, and a lithium ion battery using lithium manganate as a positive electrode material (manufactured by ELEXEL Co., Ltd., for electric assist bicycle, electric capacity 12Ah, (Voltage 48V, mass 6.15 kg, size 87 × 126 × 465 mm). In addition, 11 is a handle convenient for taking out and carrying the battery 8, and 12 is a switch. The width of the signboard 2 is 500 mm including the iron lateral member 13, and the depth outside dimension of the battery storage unit 4 (the surface material 1 at the lower part of the display unit 3 is set as the measurement start point) is about 50 cm.

FIG. 2 is a longitudinal sectional view in which the surface light emitter 5 used in FIG. 1 is taken out and a part thereof is omitted.
The LED chip 6 is arranged with a printed wiring 7 on a white PET film (film substrate) 14 having a thickness of 80 to 110 μm. The LED chip 6 and the printed wiring 7 are made of a polyvinyl chloride film (transparent plastic) having a thickness of 100 μm. Film) 15 is heat laminated. Since the polyvinyl chloride film 15 is sufficiently tightly coated so as to follow the outer shape of the LED chip 6, no gap is generated.

  An adhesive layer 16 and an aluminum plate 17 are provided in this order on the opposite side (back side) of the LED chip 6 and the printed wiring 7. This surface light emitter had a thickness of about 4 mm and a mass of about 1200 g including the aluminum plate 17 as a whole.

  FIG. 3 is a conceptual vertical cross-sectional view of the upper portion of the display unit in FIG. 1, and the display unit 3 is composed of a box-shaped body having a front plate 1, a pair of lateral members 13 and a back plate 19. . The horizontal member 13 is made of iron that is integrated with the back plate 19, and the front plate 1 is inserted into a groove of a frame 23 that is extended to the front side and formed in a U-shaped cross section. The provided aluminum plate 17 is attached to the back plate 19 via an adhesive layer (not shown).

The distance (referred to as h) between the LED chip 6 of the surface light emitter 5 and the surface of the surface plate 1 can be changed by changing the LED chip disposition distance (referred to as pitch, L), so that the emitted light can be displayed uniformly. It is preferable in that it can be uniformly illuminated by being diffused on the surface of the face plate.
A semi-transparent acrylic resin plate, a so-called acrylic milk half plate (thickness 3 mm, visible light transmittance 49 to 60%) is used as the surface plate 1, and the surface light emitter has an LED chip pitch L of 37.5 mm. When 5 was used, h was 50 mm. Further, when a surface light emitter having L of 25 mm was used, h was 30 mm.

A plurality of surface light emitters 5 are arranged in a grid pattern on a white PET film (film substrate) 14 and are electrically connected to a polyvinyl chloride film (transparent plastic film). About the point which can reduce the thickness (for example, the space | interval h of the LED chip 6 of the surface light-emitting body 5 and the surface of the surface plate 1) by comprising the unit by which 15 is coat | covered. However, the inventor thinks as follows at present at present.
When an LED chip having an emission angle of about 110 degrees is used, the light emitted from the LED chip 6 is perpendicular to the plane formed by the white PET film (film-like substrate) 14 from the meaning of the emission angle.
L / 2 × tan [(180 ° -110 °) / 2]
It is in a state of being diffused to the maximum at positions separated by a distance of. Since tan 35 ° is 0.7, when L is 37.5 mm, this value is 13.0 mm, and when L is 25 mm, it is about 8.8 mm.

However, since the LED chip (element) is a point light source, the divergent light is not uniform unless seen from the light emitted from the adjacent LED chip (element) to some extent, and is viewed from the surface side of the surface plate 1. In some cases, LED chip dots are generated.
Furthermore, a part of the light reaching the back surface of the front plate 1 (acrylic milk half plate) is transmitted, but a part of the light is reflected and travels toward the polyvinyl chloride film (transparent plastic film) 15. Considering these circumstances, in order for light reaching the surface of the surface plate 1 to exhibit uniform illuminance without causing unevenness, when L is 37.5 mm, h requires 50 mm, and L When h is 25 mm, h requires 30 mm.

  In the case of a conventional signboard with a built-in fluorescent lamp (usually about 30 mm in diameter), the thickness of the advertisement display portion is required to be about 200 mm. Therefore, it can be said that h is very thin.

Further, when the surface light emitter 5 having the LED chip pitch L of 37.5 mm was used, the mass of the internally illuminated stand signboard 2 including the lithium ion battery 8 was 38.1 kg.
For comparison, when a lead-acid battery (Furukawa Battery Co., Ltd., FPX12170, voltage 12 V, mass 6 kg, capacity 17 Ah 20 hour rate) was used instead of the lithium ion battery 8, two units were required (further, a substrate type voltage converter). Therefore, the mass of the signboard was about 44 kg, exceeding 40 kg, and it was difficult for one person to handle.

DESCRIPTION OF SYMBOLS 1 Surface plate 2 Internal illumination type stand signboard 3 Display part 4 Battery storage part 5 Surface light emitter 6 LED chip 7 Printed wiring 8 Lithium ion battery 13 for electric assist bicycles Horizontal member 14 White PET film (film-like base material)
15 Polyvinyl chloride film (transparent plastic film)
17 Aluminum plate 19 Back plate 23 Frame

Claims (8)

An internally illuminated stand signboard having a display unit provided with a surface light emitter and a battery storage unit in which a lithium ion battery is detachably stored,
The surface light emitter is composed of a unit in which a transparent plastic film is coated on a wide-angle light emitting LED chip that is arranged and electrically connected in a grid pattern on a film-like substrate,
An internally illuminated stand signboard, wherein the lithium ion battery is a medium power lithium ion battery and is used as a light source for the surface light emitter.   A light emission angle of 20 to 250 of the surface light emitters arranged in a grid pattern with the same interval in the range of 20 mm to 50 mm on the film-like substrate and electrically connected is 100 ° to 120 °. The internally illuminated stand signboard according to claim 1, comprising a unit in which a transparent plastic film is coated on an LED chip.   The internally illuminated stand signboard according to claim 1 or 2, wherein the display unit is formed of a box-shaped body having a front plate, a transverse member, and a back plate.   The internally illuminated stand signboard according to claim 3, wherein a distance between a surface of the surface plate and an LED chip of the surface light emitter is about 25 mm to about 60 mm.   The internally illuminated stand signboard according to any one of claims 1 to 4, wherein the medium power lithium ion battery is a battery that can be used in any of an electric tool, an electric motorcycle, and an electric assist bicycle.   The internally illuminated stand signboard according to any one of claims 1 to 5, wherein the medium power lithium ion battery is a lithium manganate battery.   The internally illuminated stand signboard according to any one of claims 1 to 6, wherein the medium power lithium ion battery is a laminate type.   The internally illuminated stand signboard according to any one of claims 1 to 7, wherein the medium power lithium ion battery has a mass of less than 6.5 kg.

Images