JP2007139963A - Portable information processor and method for manufacturing display of portable information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a portable information processor which does not cause conspicuous change in a pattern in a portion where a display unit constituting a display and a transparent plate arranged in front thereof come into contact with each other and is so arranged that the image of the display can maintain sufficient resolution and a method for manufacturing the display of the portable information processor. <P>SOLUTION: The spacing between the tabular display unit 212 displaying the image information with the display of the portable information processor and the transparent front plate 214 for protecting the same is set in the range of ≥0.05 mm to ≤0.5 mm in the frame-shaped portion on their circumferences by a frame-shaped dust-proof cushion not shown in Fig. Granular rugged surfaces 214A of several μm to 20 μm are formed on the surface of the front plate 214 facing the display unit 212. Consequently, even if the front plate 214 and the display unit 212 are partially brought into contact by force, such as external force, the minute dot-like contacts are formed by the contact of the rugged surfaces 214A and therefore, the conspicuous change in the pattern does not occur on the display surface and the resolution is sufficiently maintained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable information processing device such as a mobile phone, a PHS or PDA, and a notebook personal computer, and a display manufacturing method for the portable information processing device, and more particularly to a relatively small size having a flat display. The present invention relates to a portable information processing apparatus and a display manufacturing method for the portable information processing apparatus.

  Small information processing apparatuses such as mobile phones, PHS (Personal Handy-phone System) or PDA (Personal Digital Assistant) are convenient to carry and are widely used. Many of such information processing apparatuses use a thin display such as a liquid crystal display or an organic EL (Electro Luminescence) display to reduce weight and size.

  FIG. 5 is a cut away portion where a display is arranged in a conventional folding cellular phone. A display 103 is incorporated in the housing 102 of the mobile phone 101, and a flat transparent front plate 105 is disposed above the display 103 via a frame-shaped dustproof cushion 104. The front plate 105 is for protecting the display device 103.

  FIG. 6 is an enlarged view of a portion surrounded by a circle 106 in FIG. An air layer 111 exists between the display 103 and the front plate 105 disposed thereon in the figure by the dust-proof cushion 104 shown in FIG. In addition, a backlight 112 is disposed on the backlight support frame 113 below the display 103. The backlight 112 includes a light guide plate 114 that emits a surface light, a reflection plate 115 that is disposed below the light guide plate 114 and reflects light toward the display 103, and scatters or diffuses light output toward the display 103. It is comprised from the diffuser plate 116 to be made. A gap 117 is formed between the diffusion plate 116 and the display device 103. One surface of the circuit board fixing double-sided tape 118 is bonded to the lower surface of the backlight support frame 113, and the circuit board 119 is bonded to the other surface.

  In such a cellular phone 101, the thickness of the entire component is reduced for miniaturization, and therefore the thickness of the air layer 111 between the front plate 105 and the display 103 is also reduced. For this reason, when a force such as an external force is applied to the front plate 105, it may be deformed and come into contact with the display 103.

  FIG. 7 shows a state in which the front plate and the display are in contact with each other. Both the front plate 105 and the display 103 are made of resin. Therefore, in the case where the refractive indexes of both are substantially equal, if the two are in close contact with each other and the air layer in that portion disappears, the transmittance of the contact portion is not changed, and the light transmission ratio increases. As a result, the close contact portion between the front plate 105 and the display device 103 has a black stain-like pattern, and there is a problem that the aesthetic appearance is deteriorated or the appearance is deteriorated.

By the way, it has been conventionally proposed to perform serration processing such as mat processing or saw teeth on the surface of a diffusion plate for allowing light diffused from below the display to enter (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 63-26624 (second page, upper right column, lines 1 to 13; FIGS. 1 and 2).

  In this proposal, it is pointed out that the gap between the diffusion plate and the liquid crystal panel may come into contact with the external force, etc., and in order to prevent the mottled pattern from appearing on the screen, The surface of the diffusion plate facing is rough. Although this proposal suggests that the surface between the liquid crystal panel and the front plate may be a rough surface, the embodiment shown therein does not perform the rough surface treatment.

  This is because, for example, if the front plate is roughened by normal machining, the uneven surface is relatively large, so that the distance from the liquid crystal panel is wide and the image of the liquid crystal panel viewed through the front plate is greatly blurred. This is because there was a problem that it would. In the portable information processing apparatus, the area of the display is limited for miniaturization. There is a requirement that as much information as possible be clearly displayed on this small size display. Therefore, the display is required to have a high resolution, and it is practically impossible to perform mat processing or serration processing on the front plate side facing the liquid crystal panel in order to satisfy this requirement. For this reason, as shown in the proposed embodiment, mat processing and serration processing are stopped on the surface of the diffusion plate facing the liquid crystal panel. As a result, conventionally, the distance between the liquid crystal panel and the front plate has to be made relatively wide so as to avoid the situation where both come into contact with each other as much as possible. Thereby, the thickness of the portable information processing apparatus could not be sufficiently reduced.

  Therefore, an object of the present invention is to prevent a noticeable change in pattern from occurring even if a display device constituting the display and a transparent plate arranged in front of the display come into contact with each other, and the display image has a sufficient resolution. An object of the present invention is to provide a portable information processing apparatus and a display manufacturing method for the portable information processing apparatus that can be maintained.

  In the present invention, (a) a flat panel display for displaying image information and (b) a peripheral portion is arranged to face each other so as to be parallel to the display with an interval of 0.05 mm or more and 0.5 mm or less. A portable information processing apparatus is provided with a front plate that is a light-transmitting flat plate and has a uniform unevenness of several μm to 20 μm on the surface facing the display.

  In other words, in the present invention, the flat display of the portable information processing apparatus and the front plate with an interval of 0.05 mm or more and 0.5 mm or less have a granularity of several μm to 20 μm on the surface facing the display. It was decided to have unevenness uniformly. As a result, when the display and the front plate come into contact with each other due to the action of an external force, the contact is performed as fine points due to granular irregularities of several μm to 20 μm, and an air layer exists around them. There is no noticeable change in the pattern. In addition, since the unevenness is fine and the distance between the display and the front plate is short, the image on the display is not greatly blurred, and a sufficient resolution can be maintained.

  In the present invention, (a) a flat plate that is in contact with the outside of the apparatus main body and has a light-transmitting front plate, and (b) a peripheral portion is spaced from 0.05 mm to 0.5 mm in parallel with the front plate. A plane that is arranged so as to face the surface, and this surface is uniformly provided with granular irregularities of several μm to 20 μm, and a display that displays image information on this surface is portable information processing Install in the device.

  That is, in the present invention, the flat front plate of the portable information processing device and the display with a space of 0.05 mm or more and 0.5 mm or less are formed on the surface facing the front plate with granular irregularities of several μm to 20 μm. We decided to have a uniform. As a result, when the display and the front plate come into contact with each other due to the action of an external force, the contact is performed as fine points due to granular irregularities of several μm to 20 μm, and an air layer exists around them. There is no noticeable change in the pattern. In addition, since the unevenness is fine and the distance between the display and the front plate is short, the image on the display is not greatly blurred, and a sufficient resolution can be maintained.

  In the present invention, (a) a flat plate that contacts one side with the outside of the main body of the apparatus, and has a translucent front uniformly having granular irregularities of several μm to 20 μm on the surface opposite to the one surface. The face plate and (b) the peripheral portion has a plane that is spaced from 0.05 mm to 0.5 mm and is opposed to the front plate so as to be parallel to the front plate, and this surface has a granular shape of several μm to 20 μm. The portable information processing apparatus is provided with a display that has unevenness uniformly and displays image information on this surface.

  In other words, in the present invention, both the flat front plate of the portable information processing device and the display with an interval of 0.05 mm or more and 0.5 mm or less are provided with granular irregularities of several μm to 20 μm on the opposing surfaces. We decided to have a uniform. As a result, when the display and the front plate come into contact with each other due to the action of an external force, the contact is performed as fine points due to granular irregularities of several μm to 20 μm, and an air layer exists around them. There is no noticeable change in the pattern. In addition, since the unevenness is fine and the distance between the display and the front plate is short, the image on the display is not greatly blurred, and a sufficient resolution can be maintained.

  In the present invention, (a) at least one of a display device having a plane for displaying image information and a translucent front plate having a surface disposed so as to be parallel to the plane of the display device. An uneven surface forming step for uniformly forming a granular unevenness of several μm to 20 μm on the opposing surface; and (b) after forming the unevenness in the uneven surface forming step, the peripheral portions of the display and the front plate are set to be 0.00. The display manufacturing method of the portable information processing apparatus includes an interval setting step of setting an interval between the display unit and the front plate so that the opposing surfaces of the display unit and the front plate are parallel to each other with an interval of 05 mm to 0.5 mm.

  In other words, according to the present invention, there are several numbers on at least one opposing surface of a translucent front plate provided with a display having a plane for displaying image information and a surface arranged so as to be parallel to the plane of the display. Granular unevenness of μm to 20 μm is uniformly formed, and the peripheral portions of the display and the front plate are spaced apart by 0.05 mm or more and 0.5 mm or less so that the opposing surfaces of the display and the front plate are parallel to each other. The display of the portable information processing apparatus is manufactured by setting the interval between the two. As a result, when the display and the front plate come into contact with each other due to the action of an external force, the contact is performed as fine points due to granular irregularities of several μm to 20 μm, and an air layer exists around them. There is no noticeable change in the pattern. In addition, since the unevenness is fine and the distance between the display and the front plate is short, the image on the display is not greatly blurred, and sufficient resolution can be maintained.

  As described above, according to the present invention, a peripheral portion between a display device having a plane for displaying image information and its front plate is arranged in a state of being close to each other with an interval of 0.05 mm or more and 0.5 mm or less. And since it decided to form the granular unevenness | corrugation of several micrometers-20 micrometers in at least one of the opposing surface of a display and a front plate, the thickness which both a display and a front plate occupy can be set thin, This greatly contributes to reducing the thickness of portable information processing devices. Further, the presence of fine granular irregularities makes the boundary between pixels inconspicuous while maintaining sufficient image resolution, and high-quality image information can be displayed.

  Hereinafter, the present invention will be described in detail with reference to examples.

  FIG. 1 shows the appearance of a mobile phone according to an embodiment of the present invention. This cellular phone 200 is of a foldable type and has a structure in which a first casing 201 and a second casing 202 are connected to each other by a hinge mechanism 203 so as to be freely opened and closed. An operation unit 204 and a microphone 205 are disposed in the first housing 201, and a display 206 and a speaker 207 are disposed in the second housing.

  FIG. 2 shows a state in which the upper part of the display of the mobile phone shown in FIG. 1 is disassembled. A display 212 constituting the display 206 (FIG. 1) is fixed to the opening 211 of the second housing 202 by a double-sided tape for fixing a display, whose lower surface (not shown) is positioned above the backlight (not shown). . A dustproof cushion 213 made of a member such as urethane having a frame shape is placed on the display 212, and a transparent resin front plate 214 is placed thereon so as to fit into the opening 211. Is placed. Here, the thickness of the dustproof cushion 213 is 0.3 mm when the front plate 214 is placed, and this is the air between the display 212 and the front plate 214 when no force such as an external force is applied. It becomes the thickness of the layer. In order to prevent the thinning of the mobile phone 200 and the blurring of the image, which will be described later, the thickness of the air layer is much thinner than that of the conventional product. Of course, due to the presence of the frame-shaped dustproof cushion 213, the display 212 and the front plate 214 are in a non-contact state without any force applied.

  FIG. 3 shows a state in which the second housing is cut in the AA direction of FIG. The second housing 202 includes a housing body 221 and a lid portion 222 engaged with the housing body 221. A backlight support frame 223 is incorporated in the lid 222 and is exposed to the opening 211. A circuit board 225 is bonded to the lower side of the backlight support frame 223 by a circuit board fixing double-sided tape 224. In addition, a backlight 226 is disposed in the opening 211 above the backlight support frame 223, and a display 212 and a front plate 214 are disposed thereon.

  FIG. 4 is an enlarged view of a portion surrounded by a circle 228 in FIG. A backlight 226 disposed between the display 212 and the backlight support frame 223 below the display 212 has a plurality of components stacked as shown in this figure. These are a display-fixing double-sided tape 231 with the upper surface bonded to the display 212, a diffusion plate 232 bonded to the lower surface side of the display-fixing double-sided tape 231, and the diffusion plate 232. The light guide plate 233 is disposed immediately below and emits light, and the reflector 234 reflects light output downward from the light guide plate 233 in the drawing. Here, the light guide plate 233 is a plate that is specially processed on the surface of an acrylic plate, for example, and uniformly emits light from the end face. The display fixing double-sided tape 231 has a large number of small holes through which light is transmitted, and light diffused into the display 212 by the air layer formed by these holes is made incident thereon.

  The front plate 214 is processed such that the lower surface of the backlight 226 facing the display 212 is a uniform uneven surface 214A. Such a concavo-convex surface 214A is composed of fine particulate concavo-convex having a height difference of about several μm to 20 μm. In the present embodiment, the mold is processed by etching and pressed when the front plate 214 is molded to transfer the unevenness. The uneven surface 214A is so fine, and the air layer 241 between the front plate 214 and the display 212 is as thin as 0.3 mm, so that the display can be seen by the user through the front plate 214. The 212 images can retain sufficient resolution.

  That is, in the conventional technique disclosed in Patent Document 1, the thickness of the air layer between the display 10 and the front plate 105 shown in FIG. 6 is much thicker than that of the present embodiment, and is applied to the diffusion plate 116. The unevenness due to the mat processing and serration processing is also rough and the height difference is remarkably large. For this reason, if the same level of this is applied to the lower surface side of the front plate 105, the image on the display 103 will be greatly blurred, and a practically acceptable resolution cannot be obtained. In this embodiment, the unevenness of the uneven surface 214A is uniformly formed in fine particles, and the air layer 241 is very thin, so that the high-resolution display 103 can sufficiently display the precise image. It can be expressed.

  In addition, in the mobile phone 200 of this embodiment, the uppermost layer of the backlight 226 is constituted by a display-fixing double-sided tape 231 having excellent transparency, and this is in direct contact with the opposing surface of the display 212. Accordingly, the surface of the diffusion plate 116 facing the display 103 in the conventional technique disclosed in Patent Document 1 does not need to be subjected to mat processing or serration processing in the same manner, and processing for making this portion rough may be omitted. it can.

  As described above, in this embodiment, even when the front plate 214 and the display 212 are partially in contact with each other due to the action of an external force, an air layer is secured except for the contact portion. In addition, since the display 212 and the uneven surface 214A of the front plate are in contact with each other as very small points, these point-like contact portions are not recognized at the clear visual distance of the user. As a result, there is no problem that the surface is in contact with a relatively wide surface as in the prior art, and a black stain-like pattern is generated. That is, even when the front plate 214 and the display 212 are brought into contact with each other by a force such as an external force, the appearance of the display is not impaired.

  Further, it is not necessary to limit the front plate 214 to an expensive material such as a glass material that is difficult to deform and has high rigidity. Therefore, it is possible to use a relatively inexpensive transparent resin or a material having excellent translucency. Of course, the front plate 214 itself can be made thin in order to reduce the thickness of the mobile phone 200 as a whole. Further, in this embodiment, the air layer 241 is also made thin, or the air layer between the display 212 and the diffusion plate 232 is replaced with the double-sided tape 231 for fixing the display, and the air layer in this portion is eliminated. This contributes to the thinning of the mobile phone 200. Moreover, the weight reduction of the whole mobile telephone 200 can also be aimed at by such thickness reduction.

  In the embodiments described above, the folding type mobile phone has been described. However, the present invention is similarly applied to an integrated type mobile phone or other small information processing apparatus in which a display and an operation unit are arranged in a common housing. Of course it can be applied. In the embodiment, the surface of the front plate facing the display is a fine uneven surface 214A, but the surface of the display 212 facing the front plate 214 may be such a fine uneven surface. Further, both opposing surfaces of the front plate 214 and the display 212 may be such fine uneven surfaces. Furthermore, it is needless to say that at least a part of the opposing surface of the display and the diffusing plate may be such an uneven surface.

  In addition, for the uneven surface, not only a satin-finished mold as in this embodiment is used, but also matte ink containing fine particles of several μm to 20 μm such as transparent beads is used on one side of the front plate. It can also be formed by printing on the surface. Further, fine sand particles may be sprayed on the surface of the front plate with a fluid such as air to be scraped off so as to form similar fine irregularities.

  Furthermore, in the embodiments, the present invention is applied to the main display of the mobile phone, but the present invention may naturally be applied to a sub display. In the embodiments, the present invention is applied to a transmissive display using a backlight. However, the present invention can also be applied to a reflective display.

  In the embodiment, the thickness of the air layer 241 between the front plate 214 and the display 212 is 0.3 mm, but the present invention is not limited to this. That is, the thickness of the concave / convex surface 214 </ b> A and the surface of the display 212 or the like facing the concave / convex surface 214 </ b> A is not required to be in contact with the concave / convex surface 214 </ b> A. For example, a thickness of 0.05 mm or more and 0.5 mm or less can sufficiently withstand practical use. If the periphery of the front plate 214 and the display 212 is sandwiched by the dust-proof cushion 213 so as to be thinner than the thickness range, the dust-proof action cannot be sufficiently exhibited. In addition, if the periphery of the front plate 214 and the display 212 is sandwiched by a dust-proof cushion 213 so as to be thicker than this range of thickness, the blurring of the image increases due to the granular irregularities of several μm to 20 μm. The resolution cannot be kept good.

  In the embodiment, the front plate is a transparent plate-like member. However, the front plate does not necessarily need to be completely transparent, and is slightly colored or transmits or reflects only light having a specific incident angle. A plate-like member having translucency may be used.

It is a perspective view showing the external appearance of the mobile phone in one Example of this invention. It is the disassembled perspective view showing a mode that the upper part of the display part of the mobile phone shown in FIG. 1 was disassembled. It is AA direction sectional drawing of the mobile telephone shown in FIG. It is sectional drawing to which the circumference | surroundings of the indicator in FIG. 3 and the front plate on it were expanded. It is sectional drawing of the part by which the display is arrange | positioned in the conventional folding type mobile telephone. FIG. 6 is an enlarged cross-sectional view of the periphery when an air layer is present between the display and the front plate thereon in FIG. 5. It is sectional drawing to which this circumference | surroundings in the state which the indicator and the front plate on it contacted in FIG. 5 was expanded.

Explanation of symbols

200 Cellular Phone 206 Display 212 Display 213 Dust-proof Cushion 214 Front Plate 214A Uneven Surface 226 Backlight 231 Double-sided Tape for Fixing Display 232 Diffusion Plate 241 Air Layer

Claims (6)

A flat display for displaying image information;
It is a light-transmitting flat plate disposed so that its peripheral portion is spaced from 0.05 mm to 0.5 mm in parallel and is parallel to the display, and the surface facing the display is several μm to A portable information processing apparatus comprising a front plate having 20 μm granular irregularities uniformly. A flat plate that is in contact with the outside of the main body of the apparatus and has translucency,
The peripheral portion has a plane that is spaced from 0.05 mm to 0.5 mm and is opposed to the front plate so as to be parallel to the front plate. On this surface, granular irregularities of several μm to 20 μm are uniformly formed. A portable information processing apparatus, comprising: a display device configured to display image information on the surface. A light-transmitting front plate having a flat surface with one surface in contact with the outside of the apparatus main body, and uniformly having granular irregularities of several μm to 20 μm on the surface opposite to the one surface;
The peripheral portion has a plane that is spaced from 0.05 mm to 0.5 mm and is opposed to the front plate so as to be parallel to the front plate. On this surface, granular irregularities of several μm to 20 μm are uniformly formed. A portable information processing apparatus, comprising: a display device configured to display image information on the surface.   One surface of a translucent double-sided tape is bonded to the surface opposite to the surface facing the front plate of the display, and a light emitting source is disposed on the other surface side through a diffusion plate. The portable information processing apparatus according to claim 1, wherein the portable information processing apparatus is provided. A display device having a flat surface for displaying image information and a translucent front plate having a surface disposed so as to be parallel to the flat surface of the display device. An irregular surface forming step for uniformly forming granular irregularities;
After forming the unevenness in the uneven surface forming step, the peripheral portions of the display and the front plate are spaced 0.05 mm or more and 0.5 mm or less so that the opposing surfaces of the display and the front plate are parallel to each other. A display manufacturing method for a portable information processing apparatus, comprising: an interval setting step for setting an interval between the two.   In the uneven surface forming step, a grained unevenness of several μm to 20 μm is uniformly formed by pressing a matte processed mold on the surface of at least one of the display and the front plate facing each other. The display manufacturing method of the portable information processing apparatus according to claim 5.

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