The present invention relates to a luminous display, and more
particularly, to a luminous display which is used for decoration by being
installed on an interior or exterior wall of a building and a manufacturing
method thereof.
Generally, luminous displays utilizing electrodes connected to a
luminous phosphor layer to radiate light are used in a variety of electronic and
electric goods. The displays show information for the user to view. An
example is the display used in public telephones which indicates the amount
of money inserted in the phone and the amount remaining. Such luminous
displays enable users to view the display at night or in dark places.
In the above luminous displays, as an electrode plate made of IN2O3 or
SnQ is used on both sides of the luminous paint layer, a large amount of
electrical power is used because of the high level of electrical resistivity,
manufacturing of the display with dimensions larger than 10cm x 3cm is
difficult, and manufacturing of the devices is costly.
Further, in the conventional luminous display, as a result of the size
limitation and the high resistance value of the electrode plates, the degree to
which illumination can be adjusted and colour varied is limited. Accordingly,
it is not possible to use the illuminating device for decoration purposes.
Conventional luminous displays used for decoration include
incandescent lights, fluorescent lights, and neon signs. However such devices
are not energy efficient, are expensive to install, and generate an excessive
amount of heat. As a result, it is not practical to the displays for decoration
in the home.
The present invention has been made in an effort to solve the above
problems.
It is an object of the present invention to provide a luminous display
used for decoration and a manufacturing method thereof which, though using
a luminous phosphor layer, can be manufactured to large sizes, and is able to
attain a high degree of illumination and allow the use of a variety of colours
such that both commercial and home use is feasible.
To achieve the above object, the present invention provides a luminous
display used for decoration including a front surface member and a rear
surface member. There are included between the front and rear surface
members, transparent, middle and lower electrode plates provided between the
front and rear surface members, a luminous phosphor layer disposed between
the transparent and middle electrode plate, a UV coating layer provided
adjacent to the front surface member, an upper dampproofing layer disposed
between the UV coating layer and the transparent electrode plate, a lower
dampproofing layer provided adjacent to the rear surface layer, an ionized
layer provided between the lower and middle electrode plates, and a sealing
frame placed around the luminous display, over the edges of the front and
rear surface members and to seal all the layers therebetween.
According to a feature of the present invention, filters are mounted to
the upper dampproofing layer, disposed between the UV coating layer and the
transparent electrode plate, to realize the display of a variety of colours.
A method for making a luminous display, comprising the steps of :
disposing a lower electrode plate and a middle electrode plate on a lower
dampproofing layer disposed on a rear surface member, an ionized layer being
disposed between the electrode plates; spraying a mixture made of 67 % cyano
ethyl celluloid solution and 33% luminous dust on the lower surface of a
transparent electrode plate which is made from a mixture of 55 % IN2O3, 42%
SnO2, and 3% hardening agent at the thickness of 1000Å; heat-treating the
transparent electrode plate at 500°C - 600°C to form a luminous phosphor
layer between the transparent electrode plate and the middle delectrode plate;
depositing a dampproofing layer, a UV coating layer, and a front surface
member on the transparent electrode plate; and sealing the luminous display
and all the layers using a frame placed around the edges of the luminous
display.
The middle and lower electrode plates are made by depositing a copper
sulfide (CU2SO4) solvent on an aluminium plate, drying the same, then heat
treating the plates between 380°C - 430°C such that the lower and middle
electrode plates have a high degree of electrical conductivity.
Further, the luminous dust includes 55% TiO2, 30% zinc oxide (ZnO)
and 15% zinc sulfide (ZnSO4) and the particles of said luminous dust are sized
at 0.5-1µm such that direct current is used in the luminous display.
The luminous dust may be sized at 5-20µm such that alternating current
is used in the luminous display.
By way of example, a specific embodiment of the invention will now
be shown with reference to the accompanying figures, in which :-
Figure 1 is a perspective view of a luminous display according to a
preferred embodiment of the present invention; and Figure 2 is a partial sectional perspective view of the luminous display
shown in Figure 1.
Reference will now be made in detail to the present preferred
embodiment of the invention, an example of which is illustrated in the
accompanying drawings.
In the drawings, reference numeral 1 denotes a luminous display
according to a preferred embodiment of the present invention. A transparent
electrode plate 7, middle, and lower electrode plates 8, and 88 and a luminous
phosphor layer 9 are provided between a front surface member 2 and a rear
surface member 3 of the luminous display.
A dampproofing layer 5 is interposed between the rear surface member
3 and the lower electrode plate 88, and an ionized layer 6 is interposed
between the lower electrode plate 88 and the middle electrode plate 8. The
middle and lower electrode plates 8 and 88 are made by depositing a copper
sulfide (CU2SO4) solvent on an aluminium plate, then after drying, heat
treating the plates between 380°C - 430°C such that the lower and middle
electrode plates 8 and 88 have a high degree of electrical conductivity.
A mixture made of 67% cyano ethyl celluloid solution and 33%
luminous dust is sprayed on a lower surface of the transparent electrode plate
7, then the same undergoes a heat-treatment process at 500°C - 600°C. As a
result, the luminous phosphor layer 9 is formed between the transparent
electrode plate 7 and the middle electrode plate 8.
Further, the transparent electrode plate 7 is made from a mixture of
55% IN2O3, 42% SnO2, and 3% hardening agent which is sprayed then
hardened at a thickness of 1000Å such that electrical resistance is minimized.
A dampproofing layer 4 is provided on top of the transparent electrode
plate 7, and a UV coating layer 2a is provided on top of the dampproofing
layer 4. The front surface member 2 is placed on top of the UV coating layer
2a. A sealing frame 10 is placed around the luminous display 1 over the
edges of the front and rear surface members 2 and 3 to seal all the layers
therebetween. Electrical power is supplied to the luminous display 1 by an
electrical wire 11 and a plug 12 which are connected to the electrode plate 7,
8 and 88. With the supply of electrical power, light is emitted from the
luminous phosphor layer 9 which passes through the transparent electrode
plate 7, the dampproofing layer 4, and the UV coating layer 2a to be radiated
out the front surface member 2.
In the luminous display 1 structured as in the above, it is preferable to
add a compound to allow different levels of illumination to be controlled and
colours to be varied. Such an addition allows both direct and alternating
current to be used, and the control of the level of illumination from 40Lit to
800Lit.
Namely, the luminous phosphor layer 9 is formed by spraying a
compound comprised of 67 % cyano ethyl celluloid solution and 33 % luminous
dust on the lower surface of the transparent electrode plate 7, then heat
treating the compound at 500°C - 600°C.
The above luminous dust includes 55% TiO2, 30% zinc oxide (ZnO),
and 15 % zinc sulfide (ZnSO4). If the size of the luminous dust particles is set
at 0.5-1µm and the particles amassed, direct current can be used in the
luminous display 1. However, when the size of the dust particles is set at 5-20µm
and the particles separated, alternating can be used in the luminous
display 1.
When wanting to display colours from the luminous phosphor layer 9,
copper (Cu), chrome (Cl), aluminium (Al), manganese (Mn) and other such
elements are added at different ratios to zinc sulfide (ZnS). If the 0.04% Cu
and 0.005 % Cl are added to ZnS a red colour can be displayed, if 0.08 % Cu
and 0.02% Al are added to ZnS a green colour can be displayed, and adding
0.05% Cu and 1.3% Mn to ZnS allows a pink colour to be displayed. It is
also possible to realize the display of a variety of colours by mounting colour
filters to the dampproofing layer 4.
With regard to illumination, if the ratio of Mn to Cu is fixed to 1.5/1,
by maintaining maximal density ratio of Mn at 0.5mol%, and that of Cu at
0.3mol%, a degree of illumination of 2400cd/m2 can be attained. Here, it is
preferable that a thickness of the luminous phosphor layer 9 is within a range
of 5000-6000Å with a ±3% deviation.
The transparent electrode plate 7 is formed on the luminous phosphor
layer 9 from a mixture of 55% In2O3, 42% SnO2, and 3% hardening agent at
a thickness of 1000Å. Accordingly, the resistance value of the transparent
electrode plate 7 is minimized to 10-5Ω such that only a small amount of
electricity is consumed.
Further, the middle and lower electrode plates 8 and 88 are made by
depositing a copper sulfide (CU2SO4) solvent on an aluminium plate, drying
the solvent, and heat treating the plates between 380° - 430°C. As a result,
the lower and middle electrode plates 8 and 88 have a high degree of
electrical conductivity, allowing the overall size of the luminous display 1 to
be substantially enlarged without the lower and middle electrode plates 8 and
88 warping, while preventing the generation of a potential difference and a
reduction in illumination.
In the above, by providing the dampproofing layer 4, the UV coating
layer 2a, and the front surface member 2 on top of the transparent electrode
plate 7, and the dampproofing layer 5 and the rear surface member 5 under
the lower electrode plate 88, then placing the sealing frame 10 around all the
edges of the luminous display 1, interference from external light is prevented
by the UV coating layer 2a such that the desired colour can be displayed.
In the luminous display of the present invention structured as in the
above, the electricity usage is kept to a minimum by utilizing only 0.5W - 5W
per 1 m2. Also, the display allows both direct and alternating current of 6V -
220V to be used, the size of the display can be greatly increased and the
shape altered in a variety of ways, and can realize an assortment of colours
and levels of illumination enabling the display to be used for commercial
purposes as well as in the home.
While this invention has been described in connection with what is
presently considered to be the most practical and preferred embodiment, it is
to be understood that the invention is not limited to the disclosed
embodiments, but,on the contrary, is intended to cover various modifications
and equivalent arrangements included within the spirit and scope of the
appended claims.
The reader's attention is directed to all papers and documents which are
filed concurrently with or previous to this specification in connection with this
application and which are open to public inspection with this specification, and
the contents of all such papers and documents are incorporated herein by
reference.
All of the features disclosed in this specification (including any
accompanying claims, abstract and drawings), and/or all of the steps of any
method or process so disclosed, may be combined in any combination, except
combinations where at least some of such features and/or steps are mutually
exclusive.
Each feature disclosed in this specification (including any
accompanying claims, abstract and drawings), may be replaced by alternative
features serving the same, equivalent or similar purpose, unless expressly
stated otherwise. Thus, unless expressly stated otherwise, each feature
disclosed is one example only of a generic series of equivalent or similar
features.
The invention is not restricted to the details of the foregoing
embodiment(s). The invention extends to any novel one, or any novel
combination, of the features disclosed in this specification (including any
accompanying claims, abstract and drawings), or to any novel one, or any
novel combination, of the steps of any method or process so disclosed.