JP3439367B2 - Liquid crystal display structure of electronic equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display structure of an electronic device represented by a pager, a mobile phone, a calculator and the like, which is provided with a liquid crystal display for displaying predetermined information such as characters, symbols, numbers and patterns. In particular, by providing a concealing structure in which the information on the display screen cannot be viewed directly unless the liquid crystal display is illuminated by a light source, even if foreign matter such as dust or dust is mixed in the liquid crystal display in the manufacturing process of electronic devices, The present invention relates to a liquid crystal display structure for an electronic device, which can prevent foreign matter from appearing on the display unit and can improve the productivity of the electronic device without requiring new production equipment or the like.

[0002]

2. Description of the Related Art Generally, an electronic device represented by a pager, a mobile phone, a calculator and the like is provided with a liquid crystal display structure having a liquid crystal display for displaying predetermined information such as characters, symbols, numbers and designs. There is. A liquid crystal display structure of a conventional general electronic device will be described with reference to FIG. Figure 4
[Fig. 3] is an explanatory view schematically showing a liquid crystal display structure of a conventional general electronic device, (a) is a schematic perspective view, and (b) is an enlarged cross-sectional view of a main part taken along line ZZ of (a). It is a figure.

As shown in the figure, a general liquid crystal display structure of an electronic device is provided with a liquid crystal display 103 for displaying predetermined information 103a on a substrate 102 mounted in a housing 101a of an electronic device main body 101. The display screen of the liquid crystal display 103 can be visually recognized from the outside through a window portion 101b formed on a wall portion of the housing 101a. A screen 104 made of a transparent resin plate member or the like is fitted into the window portion 101b, and the screen 104 protects the liquid crystal display 103. Also, the screen 10
4, an outer edge covering portion 104a is formed along the outer peripheral edge, and the bonded portion between the housing 101a and the screen 104 is hidden so as not to be visible from the outside.

According to the conventional liquid crystal display structure having such a structure, as shown in FIG.
An information display 103a composed of a predetermined character (character “ABC” in FIG. 4) displayed on the screen No. 3 is visible from the outside through the window 101b and the screen 104, and the user can display the information on the liquid crystal display 103. Necessary information can be obtained by reading 103a. Examples of the technology relating to the liquid crystal display structure of this kind of electronic equipment include, for example, "operation panel" described in JP-A-8-18246 and "LCD module structure of LCD display" described in JP-A-10-22665. There is.

[0005]

However, in such a conventional liquid crystal display structure of an electronic device, as shown in FIG. 4, since the screen 104 is made of a resin member having high transparency, the liquid crystal structure of the liquid crystal structure is improved. In the assembly process, if foreign matter such as dust or dust is mixed into the liquid crystal display 103 in the housing 101a or an unwanted substance (see dust 11 shown in FIG. 4).
0), there is a problem that the dust 110 is visually recognized together with the information display 103a via the screen 104.

In the liquid crystal structure of the conventional electronic device in which dust and the like can be visually recognized through the screen as described above, it is difficult to ship the electronic device with foreign matter mixed therein as it is, even if it is fine dust and the like. could not. Therefore, for an electronic device in which a foreign substance is mixed in the liquid crystal display unit, it is necessary to disassemble the entire device, clean the dust on the liquid crystal display, and then reassemble it, which greatly impairs productivity. , Was a cause of increasing the production cost.

On the other hand, even with such a conventional liquid crystal structure, the assembly work of the electronic equipment itself is performed in a clean room or the like in an artificial environment in which the foreign matter is completely eliminated, so that the foreign matter is not mixed into the liquid crystal structure. It was possible to prevent the disassembly and reassembly of the electronic device accompanying it. However, in that case, new equipment such as a clean room is required separately,
There was a problem that the cost of capital investment increased and the production cost was suppressed.

The decrease in productivity and the increase in production cost due to the inclusion of foreign matter, which the conventional liquid crystal display structure of electronic equipment has, are particularly inexpensive and mass produced.
There is a strong demand for lower prices and lower costs.
This is a serious problem for relatively inexpensive electronic devices such as mobile phones.

The present invention has been proposed in order to solve the problems of the prior arts described above. In various electronic equipment devices having a liquid crystal display structure such as a pager, a mobile phone, a calculator, etc., the liquid crystal By providing a concealment structure in which the information on the liquid crystal display cannot be viewed directly unless the display is illuminated by a light source, even if foreign matter such as dust or dirt is mixed into the liquid crystal display during the manufacturing process of electronic devices, disassembly, reassembly, etc. Foreign objects can be prevented from appearing on the screen display without the need for work and new production equipment, improving the productivity of electronic devices and eliminating the need for new equipment costs. An object of the present invention is to provide a liquid crystal display structure of an electronic device capable of performing the above.

[0010]

In order to achieve the above object, a liquid crystal display structure of an electronic device according to claim 1 of the present invention is an electronic device main body, and predetermined information arranged in the electronic device main body. A liquid crystal display for displaying, a window portion formed in the housing wall portion of the electronic device main body for exposing the display screen of the liquid crystal display, a screen fitted in the window portion, and a display screen of the liquid crystal display. A light source that is disposed on the back surface side and projects the predetermined information onto the screen by illuminating the liquid crystal display, and the screen is provided when the light source is not illuminated.
Cannot see inside the device body from the outside through the screen
When the light source is illuminated, the liquid crystal display is hidden.
B) The specified information display of b.
The structure is provided with a concealing means for making the foreign matter on the crystal display invisible .

In particular, the second aspect of the invention is provided with an outer edge covering portion that is formed along the outer peripheral edge of the screen and that hides an adhesive portion between the screen and the window portion of the housing.

According to the liquid crystal display structure of the electronic apparatus of the present invention having such a configuration, by providing the screen with the concealing means, predetermined information display on the liquid crystal display can be achieved.
Not visible from the outside unless illuminated by a light source, and
When the light source illuminates, the information display is projected on the screen by the light of the light source, and dust and the like finer than the information display are not projected on the screen and are not visually recognized from the outside.

As a result, in the production process of electronic equipment, even if foreign matter is mixed in the liquid crystal display portion, it will not be visually recognized from the outside through the screen, so that it can be shipped as it is as a product. As described above, it is not necessary to disassemble, clean and re-assemble the work, or to install an excessive facility such as a clean room, so that the productivity of the electronic device can be improved and no new capital investment is required.

According to a third aspect of the liquid crystal display structure of the electronic device of the present invention, the concealing means is composed of ink having a concealing property formed by printing on the screen.

On the other hand, in the liquid crystal display structure of an electronic device according to a fourth aspect, the concealing means is composed of a translucent member having a concealing property, which is laminated on the screen.

As described above, the liquid crystal display structure of the electronic apparatus of the present invention can be applied as the concealing means of the present invention by using any member or means such as ink or resin member as long as it has a concealing property. It is possible to provide a highly versatile liquid crystal display structure that can utilize existing parts and materials.

Further, in the liquid crystal display structure of the electronic apparatus according to the fifth aspect, the concealing means is formed on the inner side surface of the casing of the screen.

On the other hand, in the liquid crystal display structure of the electronic apparatus according to the sixth aspect, the concealing means is formed on the outer surface of the casing of the screen.

As described above, the liquid crystal display structure of the electronic device of the present invention can be provided on either the inner surface or the outer surface of the screen, and has a versatile liquid crystal structure that can be applied to existing equipment and production lines. Can be realized. Further, particularly when the concealing means is provided on the outer surface of the screen casing, the outer edge covering portion that hides the adhesive portion between the casing and the screen can be omitted, and the production cost can be further reduced.

Further, in the liquid crystal display structure of an electronic apparatus according to a seventh aspect, the concealing means is composed of the screen formed of a translucent member having a concealing property.

According to the liquid crystal display structure of the electronic apparatus of the present invention having such a configuration, since the concealing means for concealing foreign matter such as dust is composed of the screen itself, it is not necessary to separately form the concealing means. It is also possible to omit the outer edge covering portion that hides the adhesive portion between the screen and the housing. As a result, the number of parts can be further reduced, the assembly process can be further simplified, the productivity can be further improved, and the production cost can be reduced.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a liquid crystal display structure of an electronic device according to the present invention will be described below with reference to the drawings. First Embodiment First, a first embodiment of a liquid crystal display structure of an electronic device of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an explanatory view schematically showing a liquid crystal display structure of an electronic device according to a first embodiment of the present invention, where (a) is a schematic perspective view in a state where information is not displayed on a liquid crystal display, (b) 8A is an enlarged cross-sectional view of a main part taken along line XX of FIG. Further, FIG. 2 is an explanatory view schematically showing the liquid crystal display structure of the electronic device according to the present embodiment,
(A) is a schematic perspective view of a state where information is displayed on a liquid crystal display, and (b) is an enlarged cross-sectional view of a main part taken along line YY of (a).

The liquid crystal display structure of the electronic device of the present embodiment shown in these figures is representative of a pager, a mobile phone, a calculator, etc., which is provided with a liquid crystal display for displaying predetermined information such as characters, symbols, numbers and designs. The liquid crystal display structure of the electronic device is described. In the present embodiment, the case where the electronic device is applied to a pager is described as an example. As shown in FIG. 1, the electronic device main body 1 of the present embodiment that constitutes a pager
Is composed of a housing 1a provided with a screen 4 for liquid crystal display and operation buttons 1c and 1d for performing various operations such as signal transmission and reception on the front side of the main body.

A substrate 2 on which various wirings, components, etc. are mounted is mounted in a housing 1a, and a liquid crystal display 3 for displaying predetermined information 3a is provided on the substrate 2. The liquid crystal display 3 is mounted on the substrate 2 with the display screen facing the front side of the device (upper side of the drawing), is connected to various wirings and components through the substrate 2 (not shown), and performs constant control. By operation, an information display 3a (“ABC” shown in FIG. 2 (a)) such as predetermined characters, symbols, numbers, and patterns is displayed on the screen.

On the other hand, on the wall of the housing 1a on the front side of the device,
A window portion 1b is provided so that the display screen of the liquid crystal display 3 can be visually recognized from the outside through the window portion 1b. The liquid crystal display 3 is positioned in the housing 1a so that the display screen is exposed through the window 1b, and is firmly fixed so that rattling or displacement does not occur in the housing 1a. (See FIG. 1B).

A screen 4 made of a transparent resin plate member or the like is fitted into the window portion 1b to protect the liquid crystal display 3. Here, in the present embodiment, FIG.
As shown in FIG. 2, the window portion 1b is formed in a two-step shape that narrows inside the device body and widens outside.
Is mounted and held on the step of the window 1b, and
The window 1b is attached and fixed to the housing 1a at the stepped portion using an adhesive or the like.

It should be noted that the screen 4 may be any member as long as the liquid crystal display 3 in the housing can be seen through, but it is usually light weight, low cost, and excellent in durability. It is preferable to form it by a resin molding having good properties. Then, a concealing means 6 described later is formed on the inner surface of the housing of the screen 4.

Further, the screen 4 of the present embodiment is formed with an outer edge covering portion 4a along the outer peripheral edge thereof in order to hide a portion of the step portion of the window portion 1b that is bonded to the housing 1a. The outer edge covering portion 4a is a film thickness portion formed along the outer peripheral edge portion of the inner surface of the housing of the screen 4, and in the present embodiment, it is provided by printing a light-shielding paint or the like on the screen surface. The outer edge covering portion 4a hides the adhesive portion between the housing 1a and the screen 4 so as not to be seen from the outside.

A light source 5 is provided on the back side of the display screen of the liquid crystal display 3. This light source 5 is shown in FIG.
As shown in FIG. 5, the liquid crystal display 3 is a light source means for projecting the information display 3a displayed on the liquid crystal display 3 on the screen 4 by illuminating the liquid crystal display 3 from the lower side of the drawing. I am doing it. The light source 5 can be turned on and off by the user arbitrarily turning it on and off by operating the operation means such as the operation buttons 1c and 1d provided in the electronic device body 1.

In this embodiment, the screen 4 is provided with the concealing means 6. In the present embodiment, the concealment means 6 is a film thickness member formed on the surface of the screen 4 inside the device body, and is formed on the screen 4 so as to cover the entire display screen of the liquid crystal display 3. The concealing means 6 is made of a member having a concealing property such that a certain amount of light can be transmitted, and in a normal state (when the light source is off), the concealing means 6 is concealed so that the inside of the device body cannot be seen through the screen 4 from the outside. is doing. Then, the concealment means 6 is provided with the light source 5
The light that is turned on and passes through the liquid crystal display 3 and is illuminated is transmitted, and the light of the light source 5 that is transmitted through the concealment means 6 is visible from the outside.

Here, the concealing means 6 can be provided, for example, by printing an ink having a concealing property on the surface of the screen 4. The concealing means 6 can also be provided by forming a translucent member made of a resin molding or the like having a concealing property and stacking it on the surface of the screen 4. As described above, as the concealing means 6 of the present embodiment, any member or means such as ink or resin member may be used as long as it has a predetermined concealing property, and existing parts or materials are used. It is possible.

In the present embodiment, the concealing means 6 is formed on the inner surface of the screen 4, but it may be formed on the outer surface of the screen 4 (see the second embodiment). It may be provided on both sides of the screen 4.
That is, the concealing means 6 of this embodiment can be provided on either the inner surface or the outer surface of the screen 4,
It has become possible to provide a liquid crystal structure with versatility that can be applied to existing equipment and production lines.

Next, the operation of the liquid crystal display structure of the electronic apparatus of the present embodiment having such concealing means will be described. First, when the light source 5 is not illuminated (when normal)
In addition, the liquid crystal display 3 cannot be visually recognized from the outside through the screen 4 due to the concealing property of the concealing means 6. On the other hand, when the light source 5 is turned on and the liquid crystal display 3 is illuminated from the back side of the display screen, the light of the light source 5 transmits the concealment means 6 and the screen 4 while projecting the information display 3a of the liquid crystal display 3. The information display 3 is projected on the screen 4 by the light and can be visually recognized from the outside.

At this time, as shown in FIG. 2B, even if the fine dust 10 smaller than the information display 3 is present on the liquid crystal display 3, the light from the light source 5 is fine.
By diffracting and passing through, the dust 10 passes through without being projected, and cannot be seen from the outside through the screen 4. Thereby, the user operates the operation buttons 1c, 1d, etc. to turn on / off the light source 5.
By turning off, the predetermined information display 3a displayed on the liquid crystal display 3 can be visually recognized from the outside through the screen 4 at any time, and necessary information can be obtained.

As described above, according to the liquid crystal display structure of the electronic apparatus of this embodiment, the screen 4 is provided with the concealing means 6, so that the predetermined information display 3 on the liquid crystal display 3 is displayed.
a is not visually recognized from the outside unless it is illuminated by the light source 5, and when the light source is illuminated, the information display 3a is projected on the screen 4 by the light of the light source, and dust and the like finer than the information display 3a is projected on the screen. Without being visible from the outside.

As a result, even if foreign matter is mixed in the liquid crystal display section in the production process of electronic equipment, it will not be visually recognized from the outside, so that it can be shipped as a product as it is and disassembled as in the conventional case. There is no need to perform cleaning and reassembly work, or to install excessive equipment such as a clean room, so that the productivity of electronic devices can be improved and no new capital investment is required.

[Second Embodiment] Next, a second embodiment of the liquid crystal display structure of the electronic apparatus of the present invention will be described with reference to FIG. FIG. 3 is an enlarged cross-sectional view of a main part schematically showing the liquid crystal structure of the electronic device according to the second embodiment of the invention.

As shown in these figures, the liquid crystal display structure of the electronic device of the present embodiment is a modification of the liquid crystal display structure of the electronic device of the first embodiment described above, and the concealing means provided on the screen is In contrast to being provided on the inner surface of the screen in the first embodiment, in the present embodiment,
It is provided on the outer surface of the screen. The other components are the same as those in the first embodiment, and the same components are designated by the same reference numerals in the drawings, and detailed description thereof will be omitted.

As shown in FIG. 3, in the liquid crystal display structure of the electronic apparatus of this embodiment, the concealing means 6 is formed on the outer surface of the casing of the screen 4. As in the case of the first embodiment described above, the concealing means 6 of the present embodiment prints and forms an ink having a concealing property on the screen 4, or arranges a translucent member having a concealing property on the screen 4. It can be provided by installing. In this embodiment, in which the concealing means 6 is provided on the outer surface of the screen 4 as described above, the concealing means 6 also conceals the adhesive portion between the housing 1 and the screen 4, so that the concealing means 6 is provided in the first embodiment. The outer edge covering portion 4a of a certain screen 4 is omitted.

According to the liquid crystal display structure of the electronic apparatus of the present embodiment having such a configuration, the dust 10 mixed on the liquid crystal display 3 is the same as in the case of the first embodiment described above.
Can be concealed by the concealing means 6 invisible, so that it is possible to improve the productivity of the electronic device and eliminate the need for new production equipment. Further, in the present embodiment, since the concealing means 6 is provided on the outer surface of the screen 4, the outer edge covering portion 4a for concealing the adhesive portion between the housing 1 and the screen 4 can be omitted, and the production cost can be further reduced. Can be reduced.

[Third Embodiment] Further, a third embodiment of the liquid crystal display structure of the electronic apparatus of the present invention will be described. The liquid crystal display structure of the electronic device according to the present embodiment is a modified embodiment of the liquid crystal display structure of the electronic device according to the first embodiment described above, and although not shown, the screen 4 is a translucent member having a concealing property. Garbage 1 by forming by
The concealment means 6 for concealing 0 is constituted by the screen 4 itself.

Here, as the screen 4 of this embodiment functioning as the concealing means 6, for example, a screen having a certain translucency and concealability by adding a concealing paint to a transparent resin material. 4 can be formed. Further, the screen 4 is thus concealed by the concealing means 6
In the present embodiment that also functions as, as in the case of the second embodiment, it is possible to omit the outer edge covering portion 4a that hides the adhesive portion between the housing 1a and the screen 4.

According to the liquid crystal display structure of the electronic apparatus of the present embodiment having such a configuration, the same effect as in the above-described first and second embodiments can be obtained, and in addition, the dust 10 can be removed. The concealment means 6 for concealing is the screen 4
Since it is configured by itself, the number of parts can be reduced, the assembling process can be further simplified, the productivity can be further improved, and the production cost can be reduced.

The liquid crystal display structure of the electronic device of the present invention is not limited to the above-mentioned embodiment,
It goes without saying that various modifications can be made within the scope of the present invention. For example, in each of the embodiments described above,
Although a pager has been described as an example of an electronic device to which the present invention is applied, the present invention is not limited to a pager in particular, and can be applied to various electronic devices having a liquid crystal display structure such as a mobile phone and a calculator. .

[0045]

As described above, according to the liquid crystal display structure of the electronic device of the present invention, by providing the concealing structure in which the information on the liquid crystal screen cannot be directly visually recognized unless the liquid crystal display is illuminated by the light source, Even if foreign matter such as dust is mixed in the liquid crystal display in the manufacturing process, the foreign matter does not appear on the screen display without disassembling and reassembling work or new production equipment. You can This makes it possible to improve the productivity of electronic devices and eliminate the need for new equipment costs, and in particular, LCDs for electronic devices such as pagers, mobile phones, calculators, etc. for which cost reduction is required. It is suitable as a display structure.

[Brief description of drawings]

FIG. 1 is an explanatory diagram schematically showing a liquid crystal display structure of an electronic device according to a first embodiment of the present invention, in which (a) is a schematic perspective view in a state where information is not displayed on a liquid crystal display, (b) 8A is an enlarged cross-sectional view of a main part taken along line XX of FIG.

2A and 2B are explanatory views schematically showing a liquid crystal display structure of the electronic device according to the first embodiment of the present invention, FIG. 2A is a schematic perspective view of a state in which information is displayed on the liquid crystal display, and FIG. It is a principal part expanded sectional view which followed the YY line of (a).

FIG. 3 is an enlarged sectional view of an essential part schematically showing the liquid crystal structure of the electronic device according to the second embodiment of the invention.

4A and 4B are explanatory views schematically showing a liquid crystal display structure of a conventional general electronic device, FIG. 4A is a schematic perspective view, and FIG. 4B is a main part taken along line ZZ of FIG. 4A. It is an expanded sectional view.

[Explanation of symbols] 1 Electronic device body 1a housing 1b window 2 substrates 3 LCD display 3a Information display 4 screen 5 light sources 6 Concealment means 10 garbage

Claims (7)

(57) [Claims] 1. An electronic device body, Display the specified information inside the electronic device.
Liquid crystal display, The liquid crystal display formed on the housing wall of the electronic device body.
The window where the display screen of the display is exposed, A screen fitted into this window, Arranged on the back side of the display screen of the liquid crystal display,
By illuminating the liquid crystal display, the predetermined
A light source for projecting information on the screen onto the screen, The screen isWhen the light source is not illuminated, the outside through the screen
Hides the inside of the device invisible, When illuminated by the light source,
The information display is visibly transparent and the liquid crystal display
Make foreign objects on the ray invisible That it has a concealment means
The characteristic liquid crystal display structure of electronic equipment. 2. The liquid crystal display structure of an electronic device according to claim 1, further comprising an outer edge covering portion formed along an outer peripheral edge of the screen to cover an adhesive portion between the screen and the window portion of the housing. 3. The liquid crystal display structure of an electronic device according to claim 1, wherein the concealing means is composed of an ink having a concealing property, which is printed and formed on the screen. 4. The liquid crystal display structure of an electronic device according to claim 1, wherein the concealing means is composed of a translucent member having a concealing property, which is laminated on the screen. 5. The liquid crystal display structure of an electronic device according to claim 1, 2, 3, or 4, wherein the concealing means is formed on an inner surface of the housing of the screen. 6. The liquid crystal display structure of an electronic device according to claim 1, 2, 3, 4, or 5, wherein the concealing means is formed on an outer surface of a casing of the screen. 7. The liquid crystal display structure of an electronic device according to claim 1, wherein the concealing means is the screen formed of a translucent member having a concealing property.