JPH11202327A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device capable of preventing a printing layer containing phosphor from being irradiated with the light of the wavelength large in energy, improving the light resistance of the phosphor, and performing display with excellent high-grade feeling and design performance by utilizing the phosphor. SOLUTION: This liquid crystal display device is provided with a liquid crystal display panel provided with a liquid crystal layer 20 enclosed between a first substrate 1 and a second substrate 11, a polarizing plate at least on the side of the first substrate 1 or the second substrate 11, a light source part 31 on a surface opposite to the observer of the liquid crystal display panel, the printing layer composed of ink provided with the phosphor inside the light source part 31 or on the light source part 31 and an ink layer 41 for adsorbing the light of wavelength shorter than 400 nanometers between the first substrate 1 and the printing layer further.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In order to improve the color tone of a light source used in a liquid crystal display device when the light source is not turned on and when the light source is turned on, a printed layer or film having a phosphor is disposed in or on the light source unit. The transmission and absorption by the liquid crystal display device which displays by changing the ratio of transmission and scattering of liquid crystal or the ratio of transmission and absorption of liquid crystal, or the combination of liquid crystal and polarizing plate, liquid crystal and retardation plate and polarizing plate Or, in a liquid crystal display device that performs display by changing the ratio of transmission and reflection, the phosphor is deteriorated by excessive light from the observer side, or changes over time, to prevent the display quality from deteriorating. It is about structure.

[0002]

2. Description of the Related Art At present, in a liquid crystal display device, a light source section is a light emitting diode (LED) element or an electroluminescent (EL) element as a planar light emitting element.
There is a device that uses a cold cathode tube, a hot cathode tube, or an LED device, and guides light to the liquid crystal layer side by using a light guide plate.

A conventional example of a liquid crystal display device using an electroluminescent (EL) element as a planar light-emitting element and providing a printing layer containing a phosphor on the electroluminescent (EL) element will be described with reference to the drawings. explain. FIG.
It is a top view which shows the liquid crystal display device in a conventional example. FIG.
FIG. 5 is a cross-sectional view taken along line AA of the liquid crystal display device shown in FIG. A conventional example will be described below with reference to FIGS.

On a first substrate 1, a stripe-shaped signal electrode 2 made of an indium tin oxide (ITO) film, which is a transparent conductive film, is provided. On a second substrate 11 opposed to the first substrate 1 at a predetermined distance, a stripe-shaped data electrode 12 orthogonal to the signal electrode 2 on the first substrate 1 is provided. The data electrode 12 is also formed of an indium tin oxide (ITO) film which is a transparent conductive film.

Further, a liquid crystal layer 20 is provided in a gap between the first substrate 1 and the second substrate 11, and the liquid crystal layer 20 is sealed with a sealing material 16 and a sealing material 17. Further, an alignment film 15 for regularly aligning the liquid crystal layer 20 is provided on the first substrate 1 and the signal electrodes 2, and on the second substrate 11 and the data electrodes 12.

A first polarizing plate 21 is provided on the surface (back surface) of the first substrate 1 opposite to the viewer. Second substrate 11
The second polarizing plate 22 is arranged on the observer side (surface). Further, on the back surface side of the first polarizing plate 21, a light source unit 31 composed of an electroluminescent (EL) element which is a plane light emitting element and a printing layer 32 including a phosphor provided on the light source unit 31 are provided. The structure has a gap between the printing layer 32 and the polarizing plate 21.

[0007]

With the above structure, when the light source section 31 is not emitting light, a voltage is applied to the signal electrode 2 and the data electrode 12, and the liquid crystal layer 20 and the first and second polarizers 21 are applied. , 22 allow the absorption and transmission to be controlled,
Light from the observer side of the transmitting portion is transmitted to the second polarizing plate 2.
2, the second substrate 11, the liquid crystal layer 20, the first substrate 1, the first
The light passes through the polarizing plate 21 and reaches the printing layer 32 containing the phosphor, and emits the phosphor. Further, reflection from the phosphor and the resin occurs. Therefore, the emission and reflected light of the phosphor are
To the observer. Since the absorber does not emit or reflect the phosphor, it becomes darker and displays with contrast.

However, the polarizing plates 21 and 2 having no ultraviolet absorption
In the case of using a polarizing plate having a UV-absorbing treatment but a UV-absorbing tacky material to prevent the absorption of visible light, a wavelength of 10 nm at 380 nm is used.
% Of ultraviolet light is transmitted. For this reason, the phosphor absorbs light having a short wavelength, and the fluorescent efficiency is gradually reduced depending on the irradiation amount and irradiation intensity of ultraviolet rays, and eventually, fading occurs.

[0009] Since this phenomenon often occurs when red light is emitted, it is not possible to sufficiently secure the light resistance of a phosphor represented by red, orange, pink, and purple by a general ultraviolet absorption treatment. Can not. Therefore, in a liquid crystal display device used in an environment in which light including ultraviolet rays typified by sunlight is emitted as an external light source, the light resistance of a printing layer including a phosphor provided between the light source portion and the first substrate is reduced. Need to improve. This is a particularly important problem when the design of an arm information device or the like is important.

[0010]

In order to achieve the above object, a liquid crystal display panel of the present invention and the liquid crystal display panel are used.

According to the liquid crystal display device of the present invention, a signal electrode provided on a first substrate, a data electrode provided on a second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate are provided. A polarizing plate on at least the first substrate or the second substrate side, the second substrate is arranged on the viewer side, and the liquid crystal layer of the first substrate The light source section is provided on the opposite surface, and the light source section or the light source section has a fluorescent pigment, or a printing layer made of an ink containing a fluorescent substance made of a fluorescent dye, or a film containing a fluorescent pigment or a fluorescent dye. , Further between the first substrate and its printing layer,
An ultraviolet absorbing layer that absorbs light having a wavelength shorter than at least 400 nanometers.

According to the liquid crystal display device of the present invention, a signal electrode provided on a first substrate, a data electrode provided on a second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate are provided. A polarizing plate on at least the first substrate or the second substrate side, the second substrate is arranged on the viewer side, and the liquid crystal layer of the first substrate The light source section is provided on the opposite side, and a printing layer made of an ink containing a fluorescent substance made of a fluorescent pigment or a fluorescent dye, or a film containing a fluorescent pigment or a fluorescent dye is provided in or on the light source section. Further, an ultraviolet absorbing layer that absorbs light having a wavelength shorter than at least 400 nanometers is provided between the observer surface of the second substrate and the printed layer.

According to the liquid crystal display device of the present invention, a signal electrode provided on a first substrate, a data electrode provided on a second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate are provided. A polarizing plate on at least the first substrate or the second substrate side, the second substrate is arranged on the viewer side, and the liquid crystal layer of the first substrate The light source section is provided on the opposite side, and a printing layer made of an ink containing a fluorescent substance made of a fluorescent pigment or a fluorescent dye, or a film containing a fluorescent pigment or a fluorescent dye is provided in or on the light source section. In addition, between the first substrate and the printing layer,
It has a protective layer or a protective film that transmits a wavelength substantially equal to the emission color of the phosphor.

According to the liquid crystal display device of the present invention, a signal electrode provided on a first substrate, a data electrode provided on a second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate are provided. A liquid crystal display panel comprising: a second substrate disposed on an observer side; and an observer side of the second substrate having an ultraviolet absorbing layer that absorbs light having a wavelength shorter than 380 nm. A light source portion on a surface of the first substrate opposite to the liquid crystal layer, and a printing layer made of an ink containing a fluorescent material made of a fluorescent pigment or a fluorescent dye in the light source portion or on the light source portion; Or a film containing a phosphor, further comprising:
Between the substrate and its printing layer absorbs light of at least shorter wavelength than 400 nanometers.

According to the liquid crystal display device of the present invention, a signal electrode provided on a first substrate, a data electrode provided on a second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate are provided. A polarizing plate on at least the first substrate or the second substrate side, the second substrate is arranged on the viewer side, and the liquid crystal layer of the first substrate The light source section is provided on the opposite side, and a printing layer made of an ink containing a fluorescent substance made of a fluorescent pigment or a fluorescent dye, or a film containing a fluorescent pigment or a fluorescent dye is provided in or on the light source section. Further, the first substrate also has a printing layer made of an ink containing a phosphor.

The liquid crystal display device of the present invention has a printing layer made of an ink containing a phosphor made of a fluorescent pigment or a fluorescent dye, or a film containing a phosphor, and the phosphor has a plurality of colors. Further, a plurality of protective layers or protective films transmitting substantially the same wavelength as the phosphor of each color are provided on each phosphor.

According to the liquid crystal display device of the present invention, a signal electrode provided on a first substrate, a data electrode provided on a second substrate, and a liquid crystal layer sealed between the first substrate and the second substrate are provided. A polarizing plate on at least the first substrate or the second substrate side, the second substrate is arranged on the viewer side, and the liquid crystal layer of the first substrate Has a light source portion on the opposite surface, and in the light source portion or on the light source portion, has a printing layer made of a printing layer made of an ink containing a fluorescent pigment or a phosphor made of a fluorescent dye, and the printing layer is made of A layer containing a phosphor and an ultraviolet absorbing layer that absorbs light having a wavelength shorter than at least 380 nanometers, and the uppermost layer located on the first substrate side is an ultraviolet absorbing layer.

The ultraviolet absorbing layer used in the liquid crystal display of the present invention is characterized in that it absorbs a wavelength longer than the ultraviolet light absorbed by the polarizing plate used in the liquid crystal display of the present invention.

In the printing layer or film containing a phosphor used in the liquid crystal display device of the present invention, the closer to the first substrate, the greater the content of the phosphor, and conversely, the closer to the light source, the greater the content of the phosphor. It is characterized by a small amount.

In the liquid crystal display device of the present invention, at least one of the first polarizing plate provided on the light source portion side of the first substrate and the second polarizing plate provided on the viewer side of the second substrate is one of them. The optical axis is a transmission axis, and a substantially orthogonal optical axis is a reflection axis.

The phosphor used in the liquid crystal display device of the present invention is provided on a part of the first substrate.

The liquid crystal display device of the present invention is incorporated in an arm information device having at least a time display section, and the color of the phosphor is made the same as that of a part of the exterior of the arm information device, so that the fashionability can be improved. .

<Operation> The liquid crystal display device of the present invention has a liquid crystal layer in the gap between the first substrate and the second substrate, and applies a voltage to the liquid crystal layer to change the refractive index between the liquid crystal and the transparent solid material. The ratio of transmission and scattering is varied by the difference, or the ratio of transmission and absorption of the dichroic dye is varied by the liquid crystal layer containing the dichroic dye in the liquid crystal, or the ratio of the liquid crystal layer to the polarizing plate and the liquid crystal layer is changed. The display is performed by changing the ratio between absorption and transmission and between reflection and transmission using a polarizing plate and a retardation plate. Alternatively, a liquid crystal display panel including a combination of a first substrate and a second substrate and a liquid crystal layer or an optical film such as a polarizing plate or a retardation plate has a surface opposite to a viewer of the first substrate of the liquid crystal display panel. When excessive light is incident on the fluorescent layer in the printed layer or film containing the fluorescent pigment or fluorescent dye located on the (back side) side, deterioration of the fluorescent light of the fluorescent material and fading occur. By providing a print layer or a film between the first substrate and the phosphor for cutting ultraviolet rays having a short wavelength of 400 nm or less, irradiation of the phosphor with excessive energy can be prevented. Discoloration was significantly prevented, and the speed of deterioration of the fluorescent light of the phosphor was reduced to a fraction or less.

The ultraviolet light cut region of the polarizing plate containing the ultraviolet absorbing material has a size of 3 in order to prevent coloring due to the characteristics of the polarizing plate.
Means for cutting (removing) ultraviolet rays having a wavelength shorter than about 80 nm is employed. Further, with regard to the color polarizing plate, since the wavelengths to be transmitted are different depending on the polarization axis, light of a predetermined wavelength cannot be completely removed. For this reason, the ultraviolet absorption wavelength used for the conventional polarizing plate is not sufficient, so that at least four ultraviolet rays are provided between the phosphor and the first substrate.
A film that absorbs or reflects a wavelength of 00 nm or less,
Alternatively, a printing layer is inserted to reduce the energy of light applied to the phosphor. Further, by using a filter that selectively transmits a wavelength in the vicinity of the emission color of the phosphor, it is possible to select the energy of light applied to the phosphor,
Irradiation of the phosphor with excessive energy can be prevented.

When a printing layer in which a plurality of phosphors are arranged in a plane is used, a film that transmits a wavelength region close to the emission color of each phosphor is arranged in the same shape as the phosphors. The reliability of the phosphor can be improved without hindering the color tone of each phosphor.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> A liquid crystal display device according to a best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows the first embodiment of the present invention.
It is a top view of the liquid crystal display in an embodiment. FIG.
FIG. 2 is a sectional view taken along line BB shown in FIG. 1. less than,
The first embodiment will be described with reference to FIGS. 1 and 2 alternately.

First, a stripe-shaped signal electrode 2 made of an indium tin oxide (ITO) film, which is a transparent conductive film, is provided on the upper surface of the transparent first substrate 1. On a second substrate 11 opposed to the first substrate 1 at a predetermined distance, a stripe-shaped data electrode 12 orthogonal to the signal electrode 2 on the first substrate 1 is provided. The data electrode 12 is also formed of an indium tin oxide (ITO) film which is a transparent conductive film.

Further, a liquid crystal layer 20 is provided in a gap between the first substrate 1 and the second substrate 11, and the liquid crystal layer 20 is sealed with a sealing material 16 and a sealing material 17. Further, an alignment film 15 for regularly aligning the liquid crystal layer 20 is provided on the first substrate 1 and the signal electrodes 2, and on the second substrate 11 and the data electrodes 12.

A first polarizing plate 21 is provided on the first substrate 1 on the side opposite to the viewer (rear side). Second substrate 11
The second polarizing plate 22 is arranged on the observer side (surface). Further, on the back surface side of the first polarizing plate 21, a light source unit 31 composed of an electroluminescent (EL) element which is a plane light emitting element and a printing layer 32 including a phosphor provided on the light source unit 31 are provided. The fluorescent substance used is a fluorescent pigment manufactured by Shinloych, FA-40 series, and a polyester resin manufactured by Teikoku Ink is used as a binder from 28 to 30.
% Of the solvent for screen printing. The colors of the fluorescent pigments include, for example, red, orange, purple, blue, green, and yellow, and the degradation due to visible light occurs particularly in red, orange, and purple. Therefore, in the present embodiment, the transparent color ink 41 that absorbs light having a short wavelength of 550 nm or less is provided on the orange phosphor. The color ink 41 substantially absorbs at least a wavelength of 550 nm to 350 nm and transmits selective light to the phosphor contained in the print layer 32.

With the above structure, when the light source unit 31 is not emitting light, a voltage is applied to the signal electrode 2 and the data electrode 12, and the light is absorbed by the liquid crystal layer 20 and the first and second polarizers 21 and 22. And the transmission can be controlled, so that the light from the observer side of the transmitting portion is transmitted to the second polarizing plate 22 and the second substrate 1.
1, the liquid crystal layer 20, the first substrate 1, the first polarizer 22, the wavelength of the light transmitted through the color ink 41 for wavelength selection is limited, the printing layer 32 containing a phosphor
Light arrives to emit light from the phosphor. However, light having energy higher than that required for the phosphor to emit light is cut by the color ink 41, so that deterioration of the phosphor hardly occurs.

FIG. 3 shows the wavelength dependence of the luminous intensity of the printing layer 32 containing the phosphor. The graph also shows the wavelength dependence of the transmittance of the color ink 41 provided on the print layer 32. In FIG. 3, the horizontal axis indicates the wavelength (nm), and the vertical axis indicates the emission intensity and the transmittance (%) of the color ink. The emission intensity of the printing layer 32 is shown by a curve X, and the transmittance of the color ink is shown by a curve Y. The emission intensity of the printing layer 32 containing the phosphor has a peak on the longer wavelength side than 580 nm. Further, the color ink 35 almost transmits at a wavelength longer than 550 nm. Therefore, the phosphor is not irradiated with excessive energy, and the reliability of the phosphor is improved. Further, by ensuring the transmission of the color ink at a shorter wavelength than the emission of the phosphor, the color tone of the emission of the phosphor is not impaired.

Further, since the liquid crystal display device has the first polarizing plate 21 and the second polarizing plate 22, light of a wavelength of 380 nm or less is cut off, so that the color ink 41 does not deteriorate. Also, the wavelength selection of the color ink 41 is 350
In the range from to 550 nm, sufficiently good results have been obtained.

In the phosphor used in the first embodiment of the present invention, the fading due to light has a lower reflection intensity at long wavelengths (wavelengths longer than 550 nm), especially at 550 nm, as compared with the initial spectral characteristics. In the vicinity, the reflection intensity increases. Further, on the shorter wavelength side than 500 nm, the reflection intensity decreases. This phenomenon could be greatly improved by not irradiating the phosphor with light having a wavelength shorter than 550 nm.

<Second Embodiment> Next, a liquid crystal display device according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a cross-sectional view taken along line BB of the liquid crystal display device according to the first embodiment of the present invention.
This embodiment is different from the above embodiment. In the second embodiment, the printing layer 32 containing the phosphor, the protective layer 51, and the ultraviolet absorbing layer 35 are all provided on the first substrate side. Hereinafter, the second embodiment will be described with reference to FIG.

First, a stripe-shaped signal electrode 2 made of an indium tin oxide (ITO) film, which is a transparent conductive film, is provided on the upper surface of the transparent first substrate 1. On a second substrate 11 opposed to the first substrate 1 at a predetermined distance, a stripe-shaped data electrode 12 orthogonal to the signal electrode 2 on the first substrate 1 is provided. The data electrode 12 is also formed of an indium tin oxide (ITO) film which is a transparent conductive film.

Further, a liquid crystal layer 20 is provided in a gap between the first substrate 1 and the second substrate 11, and the liquid crystal layer 20 is sealed with a sealing material 16 and a sealing material 17. Further, an alignment film 15 for regularly aligning the liquid crystal layer 20 is provided on the first substrate 1 and the signal electrodes 2, and on the second substrate 11 and the data electrodes 12.

A first polarizing plate 21 is provided on the first substrate 1 on the side opposite to the observer (back side). Second substrate 11
The second polarizing plate 22 is arranged on the observer side (surface). Further, on the back side of the first polarizing plate 21, 4
UV absorbing layer 35 for absorbing short wavelength light of not more than 00 nm
Is provided. The ultraviolet absorbing layer 35 has at least 400
Light having a wavelength shorter than nm is almost absorbed, and selective light is transmitted to the phosphor contained in the print layer 32. Further, in order to improve the humidity resistance of the printing layer 32 containing the phosphor and the printing layer 32, a protective layer 51 made of a polyimide resin is provided.

Further, a light source section 31 composed of an electroluminescent (EL) element which is a flat light emitting element is provided.

By employing the above structure, the printed layer 32 containing the phosphor is protected on the first substrate 1 side by the first polarizing plate 21 and the ultraviolet absorbing layer 35, and on the back side by the polyimide resin. Is protected by a protective layer 32 made of. Therefore, the printing layer 32 containing the phosphor can be prevented from being deteriorated by the external environment.

Third Embodiment Next, a liquid crystal display device according to a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is an embodiment different from the first embodiment corresponding to a cross-sectional view taken along line BB of the liquid crystal display device according to the first embodiment of the present invention. In the second embodiment, the liquid crystal layer is a guest-host type liquid crystal layer containing a dichroic dye and liquid crystal, and does not use a polarizing plate due to the anisotropy of the absorptivity of the dichroic dye. Further, since no polarizing plate is used, a bright display can be achieved. FIG.
The third embodiment will be described with reference to FIG.

First, a stripe-shaped signal electrode 2 made of an indium tin oxide (ITO) film as a transparent conductive film is provided on the upper surface of the transparent first substrate 1. On a second substrate 11 opposed to the first substrate 1 at a predetermined distance, a stripe-shaped data electrode 12 orthogonal to the signal electrode 2 on the first substrate 1 is provided. The data electrode 12 is also formed of an indium tin oxide (ITO) film which is a transparent conductive film.

Further, in the gap between the first substrate 1 and the second substrate 11, there is provided a liquid crystal layer 20 containing a dichroic dye in the liquid crystal, and the liquid crystal layer 20 is formed by a sealing material 16 and a sealing material 17. It is enclosed. Further, an alignment film 15 for regularly aligning the liquid crystal layer 20 is provided on the first substrate 1 and the signal electrodes 2, and on the second substrate 11 and the data electrodes 12. The twist angle uses a 240 degree twist to increase the contrast ratio. The 240 degree twist enables a small hysteresis.

On the observer side of the second substrate 11, in order to prevent ultraviolet rays from being incident on the liquid crystal layer 20 from an external light source, ultraviolet rays absorbing a wavelength shorter than 380 nm (nm) are used. A layer 36 is provided. Compared to the absorption wavelength of the ultraviolet absorbing layer provided on the printing layer containing the phosphor, only the ultraviolet rays on the shorter wavelength side are absorbed, and the coloring of the liquid crystal layer 20 is prevented.

Further, a light source section 31 made of an electroluminescent (EL) element is provided on the side of the first substrate 1 opposite to the observer (back side). A printed layer 32 containing a phosphor is provided between the light source unit 31 and the first substrate 1 and on the light source unit 31. Further, on the printing layer 32, 550
A transparent color ink layer 41 that absorbs light having a short wavelength of not more than nm is provided. The color ink layer 35 substantially absorbs at least the wavelength of 550 nm to 350 nm, and transmits selective light to the phosphor contained in the print layer 32.

By adopting the above structure, the second
The light resistance of the liquid crystal layer 20 can be improved by the ultraviolet absorbing layer 36 provided on the substrate 11. Further, the color ink layer 41 provided on the printing layer 32 and the ultraviolet absorbing layer 36 on the second substrate 11 can prevent the phosphor from being irradiated with light of excessive energy. Therefore, even when the liquid crystal layer 20 that does not require a polarizing plate is used, the improvement of the light resistance of the liquid crystal layer 20 and the improvement of the light resistance of the phosphor can be simultaneously performed by the ultraviolet absorbing layer 36 and the color ink layer 41. .

<Fourth Embodiment> Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, a printing layer including a phosphor and an electroluminescent (EL) element are arranged on a back surface of a liquid crystal display panel having at least a first substrate, a second substrate, and a liquid crystal layer provided therebetween. It is related to the structure of. The printed layer containing the phosphor emits fluorescent light by light from an external light source, so that a bright and rich color display can be performed. Further, the phosphor is turned on by the electroluminescent (EL) element. Since light is emitted, the emission color of the electroluminescent (EL) element can be changed or the emission efficiency can be improved. FIG. 6 is a sectional view of an electroluminescent (EL) element.
Hereinafter, a fourth embodiment will be described with reference to FIG.

First, an indium tin oxide film 44 as a transparent conductive film is formed on the back surface (lower side in FIG. 5) of a polyethyl terephthalate (PET) film 43 as a transparent film.
Is provided. Next, a light emitting layer 45 containing manganese (Mn) as a light emitting center in zinc sulfide (ZnS) is provided. Next, an insulating reflective layer 46, a back electrode 47, and an insulating layer 48 are provided in this order. In order to apply a voltage between the transparent conductive film 44 and the back electrode 47, an upper electrode 49 provided on a part of the transparent conductive film 44 and an electrode terminal 50 provided on a part of the back electrode 47 are provided. The structure described above is the structure of a general electroluminescent (EL) element.

Further, in the third embodiment, a printing layer 42 containing a phosphor and a transparent ink layer 41 are provided on a PET film 43 constituting an electroluminescent (EL) element. By providing an ink layer 41 on the print layer 42 having spectral characteristics substantially equal to the spectral characteristics of the print layer 42 containing the fluorescent substance and containing at least the wavelength of the fluorescent light emission, it is possible to prevent irradiation of the fluorescent substance with excessive energy. And deterioration of the color tone of the phosphor can be prevented. In addition, since it is integrated with an electroluminescent (EL) element, it can be incorporated into a liquid crystal display device using a conventional electroluminescent (EL) element.
It can be used without modification when using an element.

As described above, the conventional electroluminescent (EL) element is provided by providing the printing layer 42 containing a phosphor on the electroluminescent (EL) element.
Compared to the case of a single element, it is possible to make the color multi-colored.
Further, in the case of performing color light emission, the luminous efficiency of the electroluminescent (EL) element can be improved. Also, P
By providing the printing layer 32 containing the phosphor on the ET,
A conventional electroluminescent (EL) element can be used as it is, and color selection can be simplified. Further, by providing an ink layer 41 containing substantially the same spectral characteristics as the phosphor and the emission wavelength of the phosphor on the printing layer 42 containing the phosphor, excess energy on the short wavelength side of an external light source such as sunlight can be obtained. Irradiating the phosphor with light in an appropriate wavelength region can be prevented. Therefore, deterioration of the phosphor can be greatly improved. Further, deterioration due to humidity can be prevented.

<Fifth Embodiment> Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, similarly to the fourth embodiment, printing including a phosphor disposed on the back surface of a liquid crystal display panel having at least a first substrate, a second substrate, and a liquid crystal layer provided therebetween is provided. The structure of the layer and the electroluminescent (EL) element will be described. The printed layer containing the phosphor emits fluorescent light by light from an external light source, so that a bright and rich color display can be performed. Further, the phosphor is turned on by the electroluminescent (EL) element. Since light is emitted, the emission color of the electroluminescent (EL) element can be changed or the emission efficiency can be improved. FIG. 7 is a sectional view of an electroluminescent (EL) element. Hereinafter, a fifth embodiment will be described with reference to FIG.

On the back surface (the lower side in FIG. 5) of a polyethyl terephthalate (PET) film 43 which is a transparent film, a printing layer 42 containing a phosphor is provided. Next, an indium oxide tin oxide film 44 which is a transparent conductive film is provided. Next, a light emitting layer 45 containing manganese (Mn) as a light emitting center in zinc sulfide (ZnS) is provided. Next, an insulating reflective layer 46, a back electrode 47, and an insulating layer 48 are provided in this order. In order to apply a voltage between the transparent conductive film 44 and the back electrode 47, an upper electrode 49 provided on a part of the transparent conductive film 44 and an electrode terminal 50 provided on a part of the back electrode 47 are provided. In the fifth embodiment, an electroluminescent (EL)
A printing layer 42 containing a phosphor is provided on the back surface of a PET film 42 constituting an element. Therefore, the phosphor is PET
Since the film 42 and the transparent conductive film 44 or the members constituting the electroluminescent (EL) element can be isolated from the outside air, deterioration due to humidity can be prevented.

Further, in the fifth embodiment, a permeable ink layer 41 is provided on a PET film 43 constituting an electroluminescent (EL) element. The ink layer 41 has spectral characteristics substantially equivalent to the spectral characteristics of the printing layer 42 containing the fluorescent substance, and has at least the wavelength of the fluorescent light emission. Irradiation of excessive energy to the phosphor can be prevented. Further, since it is integrated with the electroluminescent (EL) element, it can be incorporated into a liquid crystal display device without any change as compared with the case of using the conventional electroluminescent (EL) element.

As described above, by providing the printing layer 42 containing the phosphor between the PET film of the electroluminescent (EL) element and the transparent conductive film, the conventional electroluminescent (EL) element alone can be used. As compared with the case of (1), it is possible to make the colors multi-colored. Further, in the case of performing color light emission, the luminous efficiency of the electroluminescent (EL) element can be improved. Further, by providing an ink layer 41 having substantially the same spectral characteristics as the phosphor and the emission wavelength of the phosphor on the PET film 43, an external light source, for example, a wavelength region of excess energy of energy on the short wavelength side of sunlight is provided. Irradiation of the phosphor with light can be prevented. Therefore, deterioration of the phosphor can be greatly improved.

<Sixth Embodiment> Next, a sixth embodiment of the present invention will be described. In the sixth embodiment, similarly to the fourth embodiment, printing including a phosphor disposed on the back surface of a liquid crystal display panel having at least a first substrate, a second substrate, and a liquid crystal layer provided therebetween is provided. The structure of the layer and the electroluminescent (EL) element will be described. The printing layer containing the phosphor emits fluorescence by light from an external light source,
Bright and rich color display can be performed.
By turning on the electroluminescent (EL) element,
Since the phosphor emits light, the electroluminescent (E)
L) The emission color of the element can be changed or the emission efficiency can be improved. FIG. 8 is a cross-sectional view of an electroluminescent (EL) element. Hereinafter, a sixth embodiment will be described with reference to FIG.

First, an indium tin oxide oxide film 44 as a transparent conductive film is formed on the back surface (the lower side in FIG. 5) of a polyethyl terephthalate (PET) film 43 as a transparent film.
Is provided. Next, a light emitting layer 45 containing manganese (Mn) as a light emitting center in zinc sulfide (ZnS) is provided. Next, an insulating reflective layer 46, a back electrode 47, and an insulating layer 48 are provided in this order. In order to apply a voltage between the transparent conductive film 44 and the back electrode 47, an upper electrode 49 provided on a part of the transparent conductive film 44 and an electrode terminal 50 provided on a part of the back electrode 47 are provided. The structure described above is the structure of a general electroluminescent (EL) element.

Further, in the sixth embodiment, a printing layer 42 containing a phosphor is provided on a PET film 43 constituting an electroluminescent (EL) element. Further, a printing layer 52 containing a phosphor is provided again. As a result of the experiment, when an orange fluorescent pigment is used as the phosphor contained in the print layer, the saturation decreases due to ultraviolet light or visible light and the lightness increases. Only orange fluorescent pigments are used. Next, for the upper print layer 52, a mixture of a white fluorescent pigment and an orange fluorescent pigment is used. As described above, even when the upper print layer 52 is slightly deteriorated, the observer does not recognize the deterioration by using the color of the lower print layer 42. Further, by providing the printing layers 42 and 52 in two layers, it is possible to prevent the deterioration of the printing layer due to the influence of the underlayer of the printing layer.

In the case of a red or pink fluorescent pigment, the color tone is strong due to deterioration, contrary to orange.
Since the decrease in brightness has occurred, the phosphor contained in the lower printing layer 42 has a bright color tone by using a mixture of the fluorescent pigments of each color and the white fluorescent pigment, and the upper printing layer 52 has a dark color fluorescent pigment. We are using. As described above, some deterioration of the phosphor is at a level that cannot be recognized by an observer.

Further, on the printing layer 52 containing the phosphor,
A transparent ink layer 41 is provided. The ink layer 41 has spectral characteristics substantially equivalent to the spectral characteristics of the printing layer 42 containing the fluorescent substance, and includes at least the wavelength of the fluorescent light emission, thereby preventing irradiation of the fluorescent substance with excessive energy and deterioration of the color tone of the fluorescent substance. Has the effect of preventing. Further, since it is integrated with the electroluminescent (EL) element, it can be incorporated into a liquid crystal display device without any change from the case of using a conventional electroluminescent (EL) element.

As described above, by providing the printing layer 42 containing a fluorescent substance on the electroluminescent (EL) element, the number of colors can be increased as compared with the conventional electroluminescent (EL) element alone. Colorization becomes possible. Further, when performing color light emission, the luminous efficiency of the electroluminescent (EL) element can be improved. Further, the visibility of the deterioration of the phosphor can be reduced by using the print layers 42 and 52 having a multilayer structure. Further, by providing the ink layer 41 containing the spectral characteristics substantially equal to those of the phosphor and the emission wavelength of the phosphor on the printing layer 52 containing the phosphor, excess energy of the external light source, for example, sunlight on the short wavelength side is obtained. Irradiating the phosphor with light in an appropriate wavelength region can be prevented. Therefore, deterioration of the phosphor can be greatly improved.

<Seventh Embodiment> Next, a seventh embodiment of the present invention will be described. In the seventh embodiment, a light emitting unit disposed on an outer peripheral portion of a liquid crystal display panel having at least a first substrate, a second substrate, and a liquid crystal layer provided therebetween and light from the light emitting unit are guided to the back surface of the liquid crystal display panel. FIG. 2 is a cross-sectional view showing a structure having a light guide section that emits light, a printing layer including a phosphor provided on the light guide section, and an ink layer provided on the print layer. Hereinafter, the seventh embodiment will be described with reference to FIG.

A portion corresponding to the outer peripheral portion of the liquid crystal display panel (not shown) has a light source portion 57 composed of a cold cathode tube,
A reflection section 56 is provided around the cold cathode tube. The light guide section 55 is connected to the reflection section 56, and a scattering plate (not shown) is arranged on the liquid crystal display panel surface side of the light guide section 55. Further, on the scattering plate, a printing layer 4 containing a phosphor is provided.
2 is provided.

Further, on the printing layer 42 containing the phosphor,
A transparent ink layer 41 is provided. The ink layer 41 has spectral characteristics substantially equivalent to the spectral characteristics of the printing layer 42 containing the fluorescent substance, and includes at least the wavelength of the fluorescent light emission, thereby preventing irradiation of the fluorescent substance with excessive energy and deterioration of the color tone of the fluorescent substance. Has the effect of preventing.

In the case of a cold-cathode tube, color reproduction can be achieved by using a color glass as a fluorescent tube glass or using a color filter. However, when external light is used, the cold-cathode tube cannot be seen. Therefore, it is effective to provide the printing layer 42 containing a phosphor on the scattering plate and perform color display.

<Eighth Embodiment> A liquid crystal display device according to an eighth embodiment of the present invention will be described below with reference to the drawings. In the eighth embodiment, in order to improve the size of the polarizing plate, the size of the fluorescent printing layer containing the fluorescent pigment, and the light resistance of the fluorescent pigment, the wavelength of about 420 nm from ultraviolet light is provided on the back surface of the first substrate. The structure for limiting the size of the ink layer to be absorbed and improving the light resistance of the printing layer containing the fluorescent pigment is shown. FIG. 10 is a plan view of a liquid crystal display device according to the seventh embodiment of the present invention. FIG. 11 is a cross-sectional view taken along line CC shown in FIG. The eighth embodiment will be described below with reference to FIGS. 10 and 11 alternately.

First, a stripe-shaped signal electrode 2 made of an indium tin oxide (ITO) film, which is a transparent conductive film, is provided on the upper surface of the transparent first substrate 1. On a second substrate 11 opposed to the first substrate 1 at a predetermined distance, a stripe-shaped data electrode 12 orthogonal to the signal electrode 2 on the first substrate 1 is provided. The data electrode 12 is also formed of an indium tin oxide (ITO) film which is a transparent conductive film.

Further, a liquid crystal layer 20 is provided in a gap between the first substrate 1 and the second substrate 11, and the liquid crystal layer 20 is sealed with a sealing material 16 and a sealing material 17. Further, an alignment film 15 for regularly aligning the liquid crystal layer 20 is provided on the first substrate 1 and the signal electrodes 2, and on the second substrate 11 and the data electrodes 12.

A first polarizing plate 21 is provided on the first substrate 1 on the side opposite to the observer (back side). Second substrate 1
The second polarizing plate 22 is disposed on the side (surface) of the first observer. Further, on the further back side of the first polarizing plate 21, there are provided an ultraviolet absorbing layer 35 containing an ultraviolet absorbing agent, a printing layer 32 containing a fluorescent substance, and a protective layer 51 for mixing the polyimide resin with the ultraviolet absorbing agent. Compared to the size of the first polarizing plate 21, the ultraviolet absorbing layer 35 and the printing layer 32 are smaller in shape by the width W1 and the width W2 than the periphery of the first polarizing plate. The printing layer 32 and the ultraviolet absorbing layer 35 have the same shape. Since the printing layer 32 and the ultraviolet absorbing layer 35 are formed by the same printing plate, they are the same. In addition, the protective layer 51
Is the size between the first polarizing plate 21 and the printing layer 32, and is provided inside the side of the first polarizing plate 21 by the width W2. This is because the ultraviolet absorbing layer 35 is inserted between the first polarizing plate 21 and the first substrate 1 to prevent the adhesive of the first polarizing plate 21 from being deteriorated, and to prevent the first polarizing plate 21 from being damaged by the first protection layer 51. This is to prevent deformation around the polarizing plate 21. Further, the printing layer 32 and the ultraviolet absorbing layer 35 are connected to the first polarizing plate 2.
1 and the protective layer 51, it is possible to shield from the external environment, and it is possible to prevent colorfastness due to moisture.

Further, on the back surface of the protective layer 51, a light source unit 31 composed of an electroluminescent (EL) element, which is a plane light emitting element, is provided with a gap provided. Regarding ultraviolet light from an electroluminescent (EL) element,
Sufficiently absorbed by the ultraviolet absorber contained in the protective layer 51,
The phosphor is hardly irradiated with ultraviolet rays. That is, the protective layer 51 prevents the phosphor from deteriorating due to an external environment such as moisture and the light source unit 31 provided on the back surface of the print layer 32.
UV radiation from the camera is prevented.

<Ninth Embodiment> Next, a ninth embodiment of the present invention will be described with reference to the drawings. The ninth embodiment is an example in which a liquid crystal display device using a printed layer containing a phosphor is used for an arm information device. FIG. 12 is a schematic plan view showing an arm information device according to the ninth embodiment of the present invention.
FIG. 13 is a schematic sectional view taken along line DD shown in FIG. The ninth embodiment will be described below with reference to FIGS. 12 and 13 alternately.

The liquid crystal display panel used for the liquid crystal display device is as follows.
The first substrate 1 provided on the lower surface of the paper and the second substrate provided on the upper surface of the paper
Substrate 11. On the first substrate 1, an M indium tin oxide (ITO) film is used as a transparent conductive film.
Two signal electrodes are provided. On the second substrate 11 facing the first substrate 1 with a predetermined gap, there are N data electrodes. The intersection of the signal electrode and the data electrode is a pixel portion.

The pixel section is composed of an M * N matrix. Further, between the first substrate 1 and the second substrate 11,
It has a twisted nematic liquid crystal layer (TN) 20.
The liquid crystal layer 20 is sealed by the first substrate 1, the second substrate 11, a sealing portion (not shown), and a sealing material (not shown). Further, an alignment film is provided on the first substrate 1 and the second substrate 11 in order to regularly arrange liquid crystals. Further, the alignment film is subjected to a rubbing treatment in order to arrange the liquid crystal layer 20 regularly. Further, a chiral material was added to twist the liquid crystal.

The second substrate 11 is arranged on the user (observer) side of the arm information device, and the observer side (front side) of the second substrate 11 is arranged.
, An absorption type polarizing plate is provided as the second polarizing plate 22.
An absorption-type polarizing plate is a polarizing plate in which one optical axis is a transmission axis and an orthogonal optical axis is an absorption axis. On the surface (back surface) of the first substrate 1 opposite to the observer, a reflective polarizing plate is provided as the first polarizing plate 21. The reflection type polarizing plate is different from the absorption type polarizing plate in that one optical axis is a transmission axis and an orthogonal optical axis is a reflection axis. As the reflective polarizing plate, DBEF (trade name) manufactured by Sumitomo 3M Limited was used.

The arm information device has a watch case 61 having a windshield 62 and a back cover 63. From the windshield 62 side, one optical axis is the absorption axis, and the other optical axis is the absorption type polarizing plate 22 having the transmission axis, the second substrate 11, the liquid crystal layer 20, the sealing material 16, the first substrate 1 And a reflective polarizing plate in which one optical axis is a reflection axis and the other optical axis is a transmission axis.

The signal electrodes (not shown) provided on the first substrate 1 are formed on the second substrate 11 by using an anisotropic conductive sealing material in which conductive beads are mixed in an epoxy adhesive. It is connected to a provided connection electrode (not shown) and is electrically rearranged on the second substrate 11. Therefore, the connection between the liquid crystal display panel and the circuit board 65 is made by connecting the data electrodes (not shown) and the connection electrodes on the second substrate 11 using the zebra rubber 67 in which conductive portions and non-conductive portions are alternately laminated. Then, a predetermined voltage is applied to the liquid crystal layer 20 to perform display. The circuit board 65 is provided with a battery 66 for power supply.

Further, the second polarizing plate 22 and the windshield 62
Between the sealing material 16 constituting the liquid crystal display panel,
Alternatively, a parting plate 64 is provided to shield the circuit board 65 and the like from an observer.

The liquid crystal display device has a character display 72 of a design of a plurality of fish swimming as characters and a plurality of red (R) polka dots, green (G) polka dots and blue (B) polka dots. And a time display section 80 including a morning and afternoon display section 73, an hour display section 74, and a minute display section 75, and a memo display section 76 for displaying a schedule or the like. When the memo display section 76 is not performing the memo display, the reflective deflecting plate enables a metallic reflection display.
Display 7 of mirror shock (MIRROR SHOCK)
6 and Ms logo display 77 are performed. Further, the arm information device has a setting button 79 for performing various display contents, time adjustment, and the like.

On the back cover 63 side (back side) of the first substrate 1,
A first polarizing plate 21 composed of a reflection type polarizing plate, and a light source unit 31
As an electroluminescent (EL) element. On the electroluminescent (EL) element, a character display section 72, a time display section 78, and a memo display section 7 are provided.
6 and a light-shielding portion 7 made of a black ink layer provided between the printing layers 32 each including an independent phosphor.
1 and an ink layer 41 having the same shape as each of the printing layers 32 and absorbing a shorter wavelength than a wavelength slightly shorter than the transmission wavelength of each of the printing layers 32. Further, since the light shielding portion 71 has a structure in which the light shielding portion 71 is in close contact with the reflection type deflection plate, and no air layer is provided between the reflection type deflection plate and the light shielding portion 71, the light shielding property can be improved by reducing the reflectance.

The logo display section 77 of the memo display section 76
By providing a plurality of printing layers 32 and ink layers 41, the decorativeness can be improved, and the design of the arm information device can be improved.

Further, the light transmitted through the ink layer 41 and the printing layer 32 containing the fluorescent material is efficiently reflected by the electroluminescent (EL) element, and the fluorescent material is used. By using the light emission by the illuminator, a bright display can be achieved.

When the printing layer 32 containing the phosphor is used alone, the fading of the phosphor occurs only by absorbing the ultraviolet rays by the polarizing plate. However, the fading of the phosphor and the emission wavelength of the phosphor occur. By adopting the ink layer 41 that absorbs on the short wavelength side, the deterioration preventing ink layer 4 suitable for each printing layer 32 is used.
1 can be provided.

Although the present embodiment has been described with reference to the arm information device, the present invention can also be applied to portable telephones and small information devices where design and decoration are important.

[0082]

As is apparent from the above description, by providing a printing layer containing a phosphor in the light source portion of a conventionally used liquid crystal display device, it is possible to display an expression with rich colors. Further, when the printing layer containing the phosphor is used alone, since the phosphor has an ultraviolet absorption wavelength, light of excessive energy irradiates the phosphor, so that light having a shorter wavelength than the ultraviolet absorption wavelength of the polarizing plate is emitted. By providing an ultraviolet absorbing layer or an ink layer which absorbs or reflects and cuts on the printing layer, the light resistance of the printing layer containing the phosphor can be improved. In particular, by cutting off light having a wavelength shorter than 400 nanometers (nm), the light resistance of the phosphor can be improved.

Further, when a printing layer containing a phosphor is used between the light source section of the liquid crystal display device and the first substrate, light having a wavelength shorter than the emission light emission of the phosphor is cut. By providing an ink layer or a film between the first substrate and the printing layer, the light resistance of the phosphor can be improved without substantially impairing the performance of the phosphor.

Further, on the back surface of the first substrate, there is provided a printing layer containing a phosphor, and further by providing a printing layer containing the phosphor in the light source section or on the light source section, excess phosphor is added to the phosphor. Even when a large energy is applied, first, the energy is reduced by the printing layer provided on the back surface of the first substrate, and the light is applied to the printing layer containing the phosphor provided in the light source portion or on the light source, Deterioration of the phosphor in the light source unit or on the light source can be greatly reduced. For this reason, the light emission of the phosphor by the lighting of the light source unit is performed first in the light source unit or on the light source, so that the light can be efficiently emitted and a bright display can be achieved.

Further, when the phosphor undergoes fading, it is transparent or scattered. In particular, in the case of a red or pink-based phosphor having poor light resistance, the fading decreases the fluorescence due to fading, and the color becomes darker. ,Get dark. Therefore, on the first substrate side, the content of the phosphor is increased, and the discoloration is improved, and the deep penetration of the excessive energy into the print layer on the light source side is prevented. In order to cover the darkness due to fading, the content of the phosphor on the light source side is reduced. Therefore, first, the light resistance of the printing layer containing the phosphor is improved by the surface layer having a large content. Can be improved by taste.

Further, by applying the present invention to an arm information device or a small information device, it is possible to improve the design and diversify.

[Brief description of the drawings]

FIG. 1 is a plan view showing a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating the liquid crystal display device according to the first embodiment of the present invention.

FIG. 3 is a graph showing the wavelength dependence of the transmittance of a printing layer and an ink layer according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a liquid crystal display device according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a liquid crystal display device according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing a structure of an electroluminescent (EL) element, a printing layer, and an ink layer according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a structure of an electroluminescent (EL) element, a printing layer, and an ink layer according to a fifth embodiment of the present invention.

FIG. 8 is a sectional view showing a structure of an electroluminescent (EL) element, a printing layer, and an ink layer according to a sixth embodiment of the present invention.

FIG. 9 is a view showing a structure of a cold cathode and a light guide plate according to a seventh embodiment of the present invention.

FIG. 10 is a plan view showing a liquid crystal display device according to an eighth embodiment of the present invention.

FIG. 11 is a sectional view showing a liquid crystal display device according to an eighth embodiment of the present invention.

FIG. 12 is a plan view showing an arm information device according to a ninth embodiment of the present invention.

FIG. 13 is a sectional view showing an arm information device according to a ninth embodiment of the present invention.

FIG. 14 is a plan view showing a conventional liquid crystal display device.

FIG. 15 is a cross-sectional view showing a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st board | substrate 2 signal electrode 11 2nd board | substrate 12 data electrode 15 alignment film 16 sealing material 20 liquid crystal layer 21 1st polarizing plate 22 2nd polarizing plate 31 light source part 32 printing layer containing a fluorescent substance 35 ultraviolet absorption Layer 36 Ultraviolet absorbing layer 41 Ink layer 43 PET film 44 Indium tin oxide (ITO) film 45 Light emitting layer 46 Insulating reflector 47 Back electrode 48 Insulating layer 49 Top electrode 50 Electrode terminal 55 Light guide plate 61 Clock case 62 Windshield 72 Character Display 80 Time display 76 Memo display 77 Logo display

Claims (12)

[Claims] A signal electrode provided on a first substrate;
A liquid crystal display panel comprising a data electrode provided on the first substrate and a liquid crystal layer sealed between the first substrate and the second substrate, wherein at least the first substrate or the second substrate has polarized light. A second substrate is disposed on the viewer side, and a light source unit is provided on a surface of the first substrate opposite to the liquid crystal layer, and a fluorescent pigment is provided in or on the light source unit. Or a printing layer made of an ink containing a phosphor made of a fluorescent dye, or a film containing a phosphor, and further, between the first substrate and the printing layer, light having a wavelength shorter than at least 400 nanometers is emitted. A liquid crystal display device having an ultraviolet absorbing layer for absorbing light. 2. A signal electrode provided on a first substrate;
A liquid crystal display panel comprising a data electrode provided on the first substrate and a liquid crystal layer sealed between the first substrate and the second substrate, wherein at least the first substrate or the second substrate has polarized light. A second substrate is disposed on the viewer side, and a light source unit is provided on a surface of the first substrate opposite to the liquid crystal layer, and a fluorescent pigment is provided in or on the light source unit. Or a printing layer made of an ink containing a phosphor made of a fluorescent dye, or a film containing a phosphor, and further, a wavelength of at least less than 400 nanometers between the printed surface and the observer surface of the second substrate. A liquid crystal display device comprising an ultraviolet absorbing layer that absorbs light of the type described above. 3. A signal electrode provided on a first substrate;
A liquid crystal display panel comprising a data electrode provided on the first substrate and a liquid crystal layer sealed between the first substrate and the second substrate, wherein at least the first substrate or the second substrate has polarized light. A second substrate is disposed on the viewer side, and a light source unit is provided on a surface of the first substrate opposite to the liquid crystal layer, and a fluorescent pigment is provided in or on the light source unit. Or a printing layer made of an ink containing a fluorescent substance made of a fluorescent dye, or a film containing a fluorescent substance, and a wavelength substantially equivalent to the emission color of the fluorescent substance between the first substrate and the printed layer. A liquid crystal display device comprising a transparent protective layer. 4. A signal electrode provided on a first substrate;
A liquid crystal display panel comprising a data electrode provided on the first substrate and a liquid crystal layer sealed between the first substrate and the second substrate, wherein the second substrate is disposed on the viewer side, The substrate side has an ultraviolet absorbing layer that absorbs light having a wavelength shorter than 380 nanometers on the observer side, and further has a light source unit on a surface opposite to the liquid crystal layer of the first substrate. In the unit or on the light source unit, there is a printing layer made of an ink containing a fluorescent substance made of a fluorescent pigment or a fluorescent dye, or a film containing a fluorescent substance, and further, between the first substrate and the printed layer. A liquid crystal display device having an ultraviolet absorbing layer that absorbs light having a wavelength shorter than at least 400 nanometers. 5. A signal electrode provided on a first substrate;
A liquid crystal display panel comprising a data electrode provided on the first substrate and a liquid crystal layer sealed between the first substrate and the second substrate, wherein at least the first substrate or the second substrate has polarized light. A second substrate is disposed on the viewer side, and a light source unit is provided on a surface of the first substrate opposite to the liquid crystal layer, and a fluorescent pigment is provided in or on the light source unit. Or a liquid crystal having a printing layer made of an ink containing a phosphor made of a fluorescent dye, or a film containing the phosphor, and further having a printing layer made of an ink containing the phosphor also on the first substrate. Display device. 6. A printing layer comprising an ink containing a fluorescent substance comprising a fluorescent pigment or a fluorescent dye, or a film comprising a fluorescent substance, wherein the fluorescent substance has a plurality of color tones, and further comprises a plurality of color tones. The liquid crystal display according to any one of claims 1 to 5, wherein a plurality of protective layers or protective films transmitting substantially the same wavelength as the phosphors are provided on each of the phosphors. apparatus. 7. A signal electrode provided on a first substrate;
A liquid crystal display panel comprising a data electrode provided on the first substrate and a liquid crystal layer sealed between the first substrate and the second substrate, wherein at least the first substrate or the second substrate has A polarizing plate; a second substrate disposed on the viewer side; a light source unit on a surface opposite to the liquid crystal layer of the first substrate; and a fluorescent pigment in or on the light source unit. Or a printing layer made of an ink containing a phosphor made of a fluorescent dye, and the printing layer is formed by laminating a layer containing the phosphor and an ultraviolet absorbing layer that absorbs light having a wavelength shorter than at least 400 nm, and A liquid crystal display device, wherein the uppermost layer located on the first substrate side is an ultraviolet absorbing layer. 8. The liquid crystal display device according to claim 1, wherein the ultraviolet absorbing layer absorbs a longer wavelength than the ultraviolet absorbing wavelength of the polarizing plate. 9. A printing layer or film containing a phosphor, wherein the closer to the first substrate side, the higher the phosphor content, and conversely, the closer to the light source, the lower the phosphor content. The liquid crystal display device according to any one of claims 1 to 8, wherein: 10. A polarizing plate provided on a light source portion side of a first substrate or an observer side of a second substrate, wherein at least one of the polarizing plates has a transmission axis, and an optical axis substantially orthogonal to the polarizing plate has a transmission axis. The liquid crystal display device according to any one of claims 1 to 3, wherein the liquid crystal display device is a reflection type deflection plate that is a reflection axis. 11. The liquid crystal display device according to claim 1, wherein the phosphor is provided on a part of the first substrate. 12. The liquid crystal display device is incorporated in an arm information device having at least a time display unit,
A liquid crystal display device in a small information device that can improve the fashionability by making the color of the phosphor the same color as a part of the exterior of the arm information device.