JP2002023664A - Mobile phone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile phone having an organic EL panel which can further reduce the thickness of the main body. SOLUTION: In the mobile phone having an organic EL panel for information display assembled in the chassis as the outer frame of the main body, the organic EL panel has a specified organic EL layer and first and second transparent substrates disposed on the light emitting side and on the back face of the organic EL layer, each substrate having a transparent electrode formed on the face opposing the organic EL layer. The first transparent substrate disposed in the light emitting side of the organic EL layer is partly exposed to the outside of the body to form the information display screen and is directly fixed to the chassis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable telephone using an organic EL panel as a display panel.

[0002]

2. Description of the Related Art At present, as a display panel mounted on a mobile phone, a liquid crystal panel capable of realizing a thinner body, a lighter weight, and a lower power consumption is mainstream. As the process progresses, further reduction in the thickness, weight, and power consumption of these main bodies has been required. In recent years, technologies that can meet such demands include organic EL (el
ectroluminescence) display panel (hereinafter, referred to as
An organic EL panel is known. This organic EL
The panel has a bright display, does not limit the viewing angle, and does not require a backlight.
Quick response time and smooth video display are possible,
It has many advantages, such as being able to operate over a wide temperature range due to the solid state device.

FIG. 11 is a longitudinal sectional view schematically showing a mobile phone in which a conventional organic EL panel is incorporated. The mobile phone 70 includes a housing 72 having an outer shape of a main body, and the housing 72.
Circuit board 7 attached along the body plane inside
3, an information display panel 80, and a plurality of push buttons 77 for inputting various settings. Information display panel 8
Numeral 0 is arranged on the circuit board 73 and is exposed from a rectangular opening 72s formed in the housing 72 to form an information display surface. Further, on the circuit board 73, a plurality of button switches 78 are provided corresponding to the push buttons 77 on the lower side of the main body (right side in the figure).

FIG. 12 is an exploded view of the information display panel 80. The information display panel 80 includes an organic EL panel 83 and a light emitting side (upper side in the figure) of the organic EL panel 83.
, And a buffer member 82 disposed between the organic EL panel 83 and the transparent substrate 81. Further, the organic EL panel 83 has a self-luminous organic EL layer 84 made of a low molecular weight or high molecular weight organic compound, and a pair of glass disposed on the light emitting side and the back side of the organic EL layer 84. It is composed of substrates 85 and 86 and a bottom plate 87 that supports these organic EL layers 84 and glass substrates 85 and 86. Organic E on glass substrates 85 and 86
On the side facing the L layer 84 (the hatched side),
The transparent electrodes are formed so as to be orthogonal to each other.

[0005]

In such a conventional configuration, in the organic EL panel 83, since the glass substrates 85 and 86 are used as the substrates sandwiching the organic EL layer 84, they are arranged on the light emitting side of the organic EL layer 84. Glass substrate 8
5 and a buffer member 82 disposed between the organic EL panel 83 and the transparent substrate 81 to reduce direct impact from the outside. And the space required for these configurations is
This can be a major constraint in further reducing the thickness of the mobile phone body.

Accordingly, the present invention has been made in view of the above technical problems, and has as its object to provide a mobile phone having an information display organic EL panel capable of realizing a thinner main body. I do.

[0007]

According to a first aspect of the present invention, there is provided a mobile phone in which an organic EL panel for displaying information is incorporated in a housing having an outer shape of a main body. An organic EL layer, and first and second transparent substrates disposed on a light emitting side and a back side of the organic EL layer, and each having a transparent electrode formed on a side facing the organic EL layer. A first transparent substrate disposed on the light emitting side of the organic EL layer is directly fixed to the housing while partially exposing the outer surface of the main body to form an information display surface. It is what it was.

[0008] In a second aspect of the present invention, in the first aspect, the surface of the first transparent substrate is flat.

Further, a third invention of the present application is the first invention, wherein the surface of the first transparent substrate is a convex surface.

In a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a side surface of the first transparent substrate extends outwardly from an inner edge of the main body along a substrate plane. A flange portion extending toward the first side is formed, and a portion other than the flange portion on the side surface of the first transparent substrate faces and contacts a peripheral cross section of an opening formed in the housing, and the flange portion is
A structure for contacting the inner wall of the housing around the opening is provided, and the first transparent substrate is fixed to the housing by bonding at least a part of the contact portion. It is.

Further, according to a fifth aspect of the present invention, in any one of the first to third aspects of the present invention, a side surface of the first transparent substrate is provided on an outer edge of the main body along a substrate plane. A flange portion extending toward the first side is formed, and a portion other than the flange portion on the side surface of the first transparent substrate faces and contacts a peripheral cross section of an opening formed in the housing, and the flange portion is
The first transparent substrate is fixed to the housing by bonding at least a part of the contact portion to the outer wall of the housing surrounding the opening. It is.

Further, according to a sixth invention of the present application, in any one of the first to third inventions, the peripheral portion of the substrate is stepped down by a predetermined depth on the surface side of the first transparent substrate. While the step-down portion is formed, the peripheral section of the opening formed in the housing extends inward along the plane of the main body from the outer edge of the main body, and the step on the first transparent substrate side is formed. A flange portion adapted to the lowered portion is formed, and a side surface including the stepped portion of the first transparent substrate is provided with a structure in which the side surface of the first transparent substrate is in contact with a peripheral cross section including the flange portion on the opening side. The first transparent substrate is characterized by being fixed to the housing by bonding at least a part of the contact portion.

Further, a seventh invention of the present application is the liquid crystal display device according to any one of the first to sixth inventions, wherein the first transparent substrate is made of a resin material.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, a thin film having a reflectivity of not more than a predetermined level is formed on the first transparent substrate. It is characterized by having been done.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Embodiment 1 FIG. FIG. 1 is a longitudinal sectional view of a mobile phone 1 according to Embodiment 1 of the present invention. The mobile phone 1 includes a housing 2 having an outer shape of a main body, a circuit board 3 mounted inside the housing 2 along a main body plane (a surface extending in a horizontal direction in FIG. 1), and an organic EL for displaying information. It has a panel 10 and push buttons 7 for inputting various settings. The organic EL panel 10 is arranged on the circuit board 3 and is exposed from a rectangular opening 2s formed in the housing 2 to form an information display surface. Further, a plurality of button switches 8 are provided on the circuit board 3 corresponding to the push buttons 7.

FIG. 2 is an exploded perspective view showing the organic EL panel 10 incorporated in the housing 2. The organic EL panel 10 includes an organic EL layer 11 having a self-luminous property, and a pair of resin-made transparent substrates 12 and 13 (hereinafter, referred to as a first transparent layer) disposed on a light emitting side and a back side of the organic EL layer 11. Substrate 1
2, a second transparent substrate 13) and a bottom plate 14 that supports the organic EL layer 11, the first and second transparent substrates 12, 13. The first and second transparent substrates 12 and 13 have a substantially flat plate shape, and their sides facing the organic EL layer 11 (hatched sides) are made of, for example, tin oxide or indium oxide. A transparent electrode made of a metal oxide film is formed. In FIG. 1, the configuration of the organic EL panel 10 is roughly divided into two parts. The portion above the broken line is the first transparent substrate 12, and the portion below the broken line is a configuration other than the first transparent substrate ( Sign 1
5).

The organic EL layer 11 is a light-emitting layer made of an aromatic tertiary amine-based organic compound, and is deposited or printed on one of the first and second transparent substrates 12 and 13. Is formed. Also, the first
And the second transparent substrates 12 and 13 are transparent substrates made of polycarbonate resin, which have a predetermined resistance or more to an external mechanical load such as an impact when dropped, and are relatively easy to mold and process. It is.

As can be clearly understood from FIG. 1, in the portable telephone 1, the first transparent substrate 12 disposed on the light emitting side of the organic EL layer 11 partially exposes the outer surface of the main body to form an information display surface. While being formed, it is directly fixed to the housing 2. In the first embodiment, the side surface of the first transparent substrate 12 and the peripheral section of the opening 2s formed in the housing 2 are both substantially perpendicular to the plane of the main body.

At the time of assembly, the first transparent substrate 12 is
, The side surface of the first transparent substrate 12 and the peripheral section of the opening 2 s formed in the housing 2 are opposed to each other and contact each other. The first transparent substrate 12 is fixed to the housing 2 by bonding the contact portions. In a state where the first transparent substrate 12 is fixed to the housing 2, the flat surface 12 a is exposed from the opening 2 s of the housing 2 and serves as an information display surface on the outer surface of the main body.

Next, the light emitting operation of the organic EL panel 10 will be described. The transparent electrodes formed on the first and second transparent substrates 12 and 13 both have a matrix structure arranged vertically and horizontally, and corresponding transparent electrodes are formed on the first and second transparent substrates 12 and 13. Exists. At the time of display, a scanning signal and an image signal are respectively applied to the transparent electrodes corresponding to each other. For example, the organic EL layer 11
When a scanning signal is applied to the first transparent substrate 12 arranged on the light emitting side of the organic EL layer 11 and an image signal is applied to the second transparent substrate 13 arranged on the back side of the organic EL layer 11, the organic EL layer 11
Emit light at points between the transparent electrodes to which the scanning signal and the image signal are applied, respectively. This light passes through the first transparent substrate 12 disposed on the light emitting side of the organic EL layer 11 and is emitted forward.

As described above, in the organic EL panel 10, the first and second transparent substrates 12 and 13 are used as the substrate that sandwiches the organic EL layer 11 via the transparent electrode. By directly fixing the first transparent substrate 12 disposed in the housing 2 to the housing 2, it is not necessary to provide a transparent substrate and a buffer member for protecting the glass substrate unlike the related art, and the mobile phone body can be made thinner. It is possible to promote.

In a comparative test performed by the inventor of the present invention, the thickness M of the mobile phone 1 shown in FIG. 1 is such that the thickness g of the organic EL panel is 2 mm (the first transparent substrate 12 is 1 mm, the second transparent substrate is 1 mm). 13 is 0.5 mm, the bottom plate 14 is 0.5 mm, and the thickness of the organic EL layer 11 is on the order of several thousand angstroms (ignored here), and the thickness d of the circuit board 3 is 1
mm, the gap length e between the circuit board 3 and the housing 2 is 1
When 0 mm and the thickness f of the housing 2 is 1 mm, M = g +
It became clear that d + e + f = 14.0 mm, which is smaller than the value for a conventionally known mobile phone.

The first transparent substrate serving as an information display surface on the outer surface of the main body is not limited to the transparent substrate 12 whose surface 12a is flat, and the surface 16a has a convex surface as shown in FIG. May be used. The transparent substrate 16 is the transparent substrate 12 shown in FIG.
Since it has a greater thickness than that of, it is possible to improve the resistance to an external mechanical load such as an impact at the time of dropping by using this.

Hereinafter, another embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and further description is omitted. In each of the embodiments described with reference to FIGS. 4 to 10, as in the first embodiment,
An organic EL panel to be incorporated in the housing is such that a predetermined organic EL layer is sandwiched between first and second transparent substrates via a transparent electrode, and the first transparent substrate is directly connected to the housing. Fixed. Further, different types of fixing structures are provided between the first transparent substrate and the housing.

Embodiment 2 FIG. 4 is a vertical sectional view showing an upper part of the main body of the mobile phone according to Embodiment 2 of the present invention.
In the second embodiment, on the side surface of the first transparent substrate 22 of the organic EL panel 20, a flange 22j extending outward from the inner edge of the main body along the substrate plane is formed.
In addition, the portion other than the flange portion 22j on the side surface is substantially perpendicular to the plane of the main body. On the other hand, the peripheral section of the opening 2s formed in the housing 2 is substantially perpendicular to the plane of the main body.

At the time of assembly, the first transparent substrate 22 is
Is positioned, the portion other than the flange 22j is opposed to and contacts the peripheral cross section of the opening 2s formed in the housing 2, and the flange 22j is positioned around the opening 2s. Contacts the inner wall of the housing 2. The first transparent substrate 22
The contact portion is fixed to the housing 2 by bonding. The surface 22a of the first transparent substrate 22 is a flat surface, and when fixed to the housing 2, the surface 22a is exposed from the opening 2s of the housing 2 and has an information display surface on the outer surface of the main body. Become.

By forming the contact portion between the first transparent substrate 22 and the housing 2 as described above, when the contact portion is adhered, the joining force between the two increases, for example, It is possible to improve the resistance to an external mechanical load such as an impact at the time of drop. When a resin material is used as the material of the first transparent substrate 22,
It is relatively simple to mold and process, and it is easily possible to make it a structure that is more resistant to mechanical loads.

The first transparent substrate provided with the fixing structure according to the second embodiment is not limited to the transparent substrate 22 having a flat surface, as shown in FIG. A transparent substrate 26 having a convex surface 26a may be used. The flange 26j has the same structure as the flange 22j shown in FIG. Since the transparent substrate 26 has a greater thickness than the transparent substrate 22 shown in FIG. 4, by using this, it is possible to improve the resistance to an external mechanical load such as an impact when dropped. it can.

Embodiment 3 FIG. 6 is a vertical sectional view showing the upper part of the main body of the mobile phone according to Embodiment 3 of the present invention.
In the third embodiment, a step-down portion 32k is formed on the surface side of the first transparent substrate 32 of the organic EL panel 30 by lowering the peripheral portion of the substrate by a predetermined depth. The portion other than the stepped-down portion 32k on the side surface of the transparent substrate 32 is
It is substantially perpendicular to the plane of the main body. On the other hand, a flange 2j extending inward from the outer edge of the main body along the plane of the main body is formed in the peripheral cross section of the opening 2s formed in the housing 2. The first transparent substrate 32
It is compatible with the lower step 32k. Opening 2s
The portion other than the flange portion 2j in the peripheral section is substantially perpendicular to the plane of the main body.

At the time of assembly, the first transparent substrate 32 is
, The side surface of the first transparent substrate 32 including the stepped portion 32j is in contact with the peripheral cross section including the flange portion 38 on the side of the opening 2s. The first transparent substrate 32 is fixed to the housing 2 by bonding the contact portions. The first transparent substrate 3
The surface 32a of the housing 2 is flat, and when fixed to the housing 2, the surface 32a is exposed from the opening 2s of the housing 2 and serves as an information display surface on the outer surface of the main body.

By forming the contact portion between the first transparent substrate 32 and the housing 2 as described above, when the contact portion is adhered, the joining force between the two increases, for example, It is possible to improve the resistance to an external mechanical load such as an impact at the time of drop. When a resin material is used as the material of the first transparent substrate 32,
It is relatively simple to mold and process, and it is easily possible to make it a structure that is more resistant to mechanical loads.

The first transparent substrate provided with the fixing structure according to the third embodiment is not limited to the transparent substrate 32 having a flat surface 32a, as shown in FIG. A transparent substrate 36 having a convex surface 36a may be used. The step-down portion 36k is a step-down portion 3 shown in FIG.
It has the same structure as 2k. Since the transparent substrate 36 has a greater thickness than the transparent substrate 32 shown in FIG. 6, by using this, it is possible to improve the resistance to an external mechanical load such as an impact when dropped. it can.

Embodiment 4 FIG. FIG. 8 is a longitudinal sectional view showing an upper part of the main body of the mobile phone according to Embodiment 4 of the present invention.
In the second embodiment, on the side surface of the first transparent substrate 42 of the organic EL panel 40, a flange portion 42j extending outward from the outer edge of the main body along the substrate plane is formed.
In addition, the portion other than the flange portion 42j on the side surface is substantially perpendicular to the plane of the main body. On the other hand, the peripheral section of the opening 2s formed in the housing 2 is substantially perpendicular to the plane of the main body.

At the time of assembly, the first transparent substrate 42 is
Is positioned, the portion other than the flange 42j is opposed to and contacts the peripheral cross section of the opening 2s formed in the housing 2, and the flange 42j is positioned around the opening 2s. Contact the outer wall of the housing 2. The first transparent substrate 42
The contact portion is fixed to the housing 2 by bonding. The surface 42a of the first transparent substrate 42 is a flat surface, and when fixed to the housing 2, the surface 42a is exposed from the opening 2s of the housing 2, and the information display surface on the outer surface of the main body. Become.

By making the contact portion between the first transparent substrate 42 and the housing 2 as described above, when such a contact portion is adhered, the joining force between the two increases, for example. It is possible to improve the resistance to an external mechanical load such as an impact at the time of drop. When a resin material is used as the material of the first transparent substrate 42,
It is relatively simple to mold and process, and it is easily possible to make it a structure that is more resistant to mechanical loads.

The first transparent substrate provided with the fixing structure according to the third embodiment is not limited to the transparent substrate 42 having a flat surface, as shown in FIG. A transparent substrate 46 having a convex surface 46a may be used. The flange 46j has the same structure as the flange 42j shown in FIG. Since the transparent substrate 46 has a greater thickness than the transparent substrate 42 shown in FIG. 4, by using this, it is possible to improve the resistance to an external mechanical load such as an impact when dropped. it can.

Embodiment 5 FIG. 10 is an exploded perspective view of an organic EL panel incorporated in a mobile phone according to Embodiment 5 of the present invention. In the fifth embodiment, an organic EL panel 10 having the same structure as in the first embodiment is used, and a surface treatment film 50 is attached on a first transparent substrate 12. The surface treatment film 50 is made of a material having a predetermined or lower reflectivity such as a material having a diffuse reflectivity or a material having a low reflectivity, and does not reflect external light. The light emitted through one transparent substrate 12 is transmitted. Furthermore, the surface treatment film 50 is made of a relatively robust material, and is hardly damaged even when a sharp mechanical load is applied. By pasting such a surface film 50 on the first transparent substrate 12, it is possible to realize a clear display on the information display surface on the outer surface of the main body.
The mechanical strength of the display screen can be improved.

The present invention is not limited to the illustrated embodiment, and it goes without saying that various improvements and design changes can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the organic EL composed of an aromatic tertiary amine organic compound is used.
Although the layer 11 has been described, the material is not limited thereto, and may be a starburst amine-based tris (8-quinolinolato) -aluminum (Tris (8-quinolinolat).
o) -aluminum type, distyryl arylene type, platinum porphyrin, Ir complex, oxadiazole type, imidazole type and other low molecular type organic materials may be used. Further, instead of the low molecular weight organic material, a high molecular weight organic material such as polyphenylene vinylene type or fluorene type may be used. Similarly, the transparent substrates 12 and 13 are not limited to polycarbonate resin-made transparent substrates, but may be made of various materials such as acrylic resin and polyethylene terephthalate resin as long as molding and processing are relatively easy. Resins or other materials may be used. Further, in the above-described embodiment, the pair of transparent substrates sandwiching the organic EL layer are both made of a resin material. However, at least the first transparent substrate may be made of a resin material.

[0039]

According to the invention of claim 1 of the present application, in a portable telephone in which an organic EL panel for displaying information is incorporated inside a casing having an outer shape of a main body, the organic EL layer in the organic EL panel is transparent. A pair of first and second transparent substrates is used as a substrate sandwiched between the electrodes, and the first transparent substrate disposed on the light emitting side of the organic EL layer is directly fixed to the housing. The need for a transparent substrate and a buffer member to protect the glass substrate is eliminated,
It is possible to promote the thinning of the mobile phone body.

Further, according to the invention of claim 2 of the present application, since the surface of the first transparent substrate is flat, the thickness of the portable telephone body can be further reduced.

Further, according to the invention of claim 3 of the present application, the first transparent substrate has a convex surface, and the first transparent substrate has
It is thicker than in the case of a flat surface, so that it is possible to improve the resistance to an external mechanical load such as an impact when dropped.

Further, according to the invention of claim 4 of the present application, a flange is formed on the side surface of the first transparent substrate and extends outward from the inner edge of the main body along the plane of the substrate. A portion other than the flange on the side surface of the first transparent substrate is opposed to and contacts a peripheral cross section of the opening formed in the housing, and the flange contacts an inner wall of the housing around the opening. When such a contact portion is adhered, the bonding force between the two is increased, and the resistance to an external mechanical load such as an impact at the time of dropping can be improved.

Further, according to the invention of claim 5 of the present application, a flange portion is formed on the side surface of the first transparent substrate and extends outward from the outer edge of the main body along the substrate plane. A portion other than the flange on the side surface of the first transparent substrate is opposed to and contacts the peripheral cross section of the opening formed in the housing, and the flange contacts the housing outer wall around the opening. When such a contact portion is adhered, the bonding force between the two is increased, and the resistance to an external mechanical load such as an impact at the time of dropping can be improved.

Further, according to the invention of claim 6 of the present application, a step-down portion formed by stepping down a peripheral portion of the substrate by a predetermined depth is formed on the front side of the first transparent substrate. A flange section extending inward from the outer edge of the main body along the plane of the main body and adapted to the step-down section on the first transparent substrate side is formed on a peripheral cross section of the opening formed in the housing. Since the side surface including the stepped portion of the first transparent substrate is provided with a structure that is adapted to contact with a peripheral cross section including the flange portion on the opening side, when such a contact portion is adhered, The joining force between them is increased, and for example, the resistance to an external mechanical load such as an impact at the time of a drop can be improved.

Further, according to the invention of claim 7 of the present application, since the first transparent substrate is made of a resin material, its forming and processing are relatively simple, and the first transparent substrate can be mechanically mounted. It is easily possible to make the structure more resistant to mechanical load.

Further, according to the invention of claim 8 of the present application, since a thin film having a reflectivity of not more than a predetermined value is formed on the first transparent substrate, the information display on the outer surface of the main body is performed. In terms of surface, a clear display can be realized, and the mechanical strength of the display screen can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a mobile phone main body according to Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of an organic EL panel incorporated in the mobile phone according to the first embodiment.

FIG. 3 is a longitudinal sectional view showing an upper part of a main body of a modification of the mobile phone according to the first embodiment.

FIG. 4 is a longitudinal sectional view showing an upper part of a main body of a mobile phone according to a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing an upper portion of a main body of a modification of the mobile phone according to the second embodiment.

FIG. 6 is a vertical sectional view showing an upper part of a main body of a mobile phone according to a third embodiment of the present invention.

FIG. 7 is a vertical sectional view showing an upper part of a main body of a modification of the mobile phone according to the third embodiment.

FIG. 8 is a longitudinal sectional view showing an upper part of a main body of a mobile phone according to Embodiment 4 of the present invention.

FIG. 9 is a longitudinal sectional view showing an upper part of a main body of a modification of the mobile phone according to the fourth embodiment.

FIG. 10 is an exploded perspective view of an organic EL panel incorporated in a mobile phone according to Embodiment 5 of the present invention.

FIG. 11 is a longitudinal sectional view of a mobile phone main body in which a conventional organic EL panel is incorporated.

FIG. 12 is an exploded perspective view of the conventional organic EL panel.

[Explanation of symbols]

Reference Signs List 1 mobile phone, 2 housing, 2a opening, 2j flange on opening side, 10, 20, 30, 40 organic EL panel,
11 Organic EL layer, 12, 16, 22, 26, 32, 3
6, 42, 46 First transparent substrate, 12a, 16a, 2
2a, 26a, 32a, 36a, 42a, 46a First
Of the transparent substrate, 13 second transparent substrate, 22j, 2
6j, 42j, 46j Flange on first transparent substrate side, 32
k, 36k Step down part, 50 surface treatment film

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaki Yamakawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5C094 AA15 AA31 AA36 AA60 BA27 EB02 HA10 5K023 AA07 BB03 BB27 DD06 EE02 HH06 LL01 LL06 PP01 QQ00 QQ03

Claims (8)

[Claims] 1. A mobile phone in which an organic EL panel for displaying information is incorporated in a housing forming an outer shape of a main body, wherein the organic EL panel includes a predetermined organic EL layer and the organic EL layer.
OLEDs are disposed on the light emitting side and the back side of the L layer, respectively.
A first transparent substrate having a transparent electrode formed on a side facing the layer; a first transparent substrate disposed on a light emitting side of the organic EL layer, a part of which is a main body; A mobile phone which is directly fixed to the housing while being exposed on an outer surface to form an information display surface. 2. The mobile phone according to claim 1, wherein a surface of said first transparent substrate is flat. 3. The mobile phone according to claim 1, wherein a surface of said first transparent substrate is convex. 4. A flange other than the flange on the side surface of the first transparent substrate is formed on a side surface of the first transparent substrate, the flange portion extending outward from an inner edge of the main body along the substrate plane. Has a structure in which the flange is in contact with a peripheral cross section of an opening formed in the housing and the flange is in contact with an inner wall of the housing around the opening. The mobile phone according to any one of claims 1 to 3, wherein the mobile phone is fixed to the housing by bonding at least a part of the contact portion. 5. A side portion of the first transparent substrate, which is formed with a flange extending outward from an outer edge of the main body along a plane of the substrate, and a portion other than the flange on the side surface of the first transparent substrate. Has a structure in which the flange is in contact with a peripheral cross section of an opening formed in the housing and the flange is in contact with an outer wall of the housing around the opening. The mobile phone according to any one of claims 1 to 3, wherein the mobile phone is fixed to the housing by bonding at least a part of the contact portion. 6. A stepped portion formed by stepping down a peripheral edge portion of the first transparent substrate by a predetermined depth is formed on a front surface side of the first transparent substrate, while a stepped portion is formed on a peripheral cross section of an opening formed in the housing. Extends inward from the outer edge of the main body along the plane of the main body, and is formed with a flange portion adapted to the step-down portion on the first transparent substrate side;
The first transparent substrate has a structure in which a side surface including a step portion is in contact with a peripheral cross section including a flange portion on the opening side so as to be in contact with the first transparent substrate, and the first transparent substrate has at least a contact portion. The mobile phone according to any one of claims 1 to 3, wherein the mobile phone is fixed to the housing by being partially adhered. 7. The mobile phone according to claim 1, wherein the first transparent substrate is made of a resin material. 8. The mobile phone according to claim 1, wherein a thin film having a reflectivity equal to or less than a predetermined value is formed on the first transparent substrate.