JP2003262711A - Reflecting body and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply a reflecting body having a fine rugged pattern at a low cost. <P>SOLUTION: The reflecting body 20 having a fine rugged pattern 25 on a reflecting film 22 is manufactured by pressing a source material 80 in a film state having layers of the reflecting film 22 and a supporting film 24 with a mold 89 having a fine rugged pattern formed on the pressing face 88. Since the reflecting body 20 can be continuously manufactured, the reflecting body can be supplied in a short time at a low cost. Even a semitransmissive reflecting body can be manufactured in the same process so that the semitransmissive reflecting body can be supplied at a low cost. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mobile phone, a PDA.
The present invention relates to a reflector suitable for a display device of a mobile terminal such as.

[0002]

2. Description of the Related Art Mobile terminals such as mobile phones and PDAs have been widely used, and a display device capable of displaying bright and clear images with low power consumption has been demanded. One of them is a reflective liquid crystal panel, which is displayed on the liquid crystal panel by using external light by providing a reflective electrode on the back surface of the liquid crystal panel or lining a sheet type reflector on the back surface. It is designed to illuminate characters and images. The reflector has a size smaller than that of the liquid crystal cell and larger than the wavelength level of visible light, from several tens of microns to 0. It is known that by providing minute irregularities of a few microns, preferably a few microns, it is possible to reflect a large amount of outside light in the direction of the eyes of the user and improve the brightness and legibility.

On the other hand, in order to clearly display a multi-color image displayed on a color liquid crystal panel, more light is required, and in consideration of night use, it is forced to use a front light or a back light. It is desirable to illuminate the area. When it is attempted to display the liquid crystal panel with more uniform illuminance, the backlight method is excellent. Therefore, a semi-transmissive liquid crystal panel that can utilize outside light has been developed. This semi-transmissive liquid crystal panel is designed to forcibly remove a part of the reflective film of the reflector to create a part through which light is transmitted, and the film thickness of the reflective film such as aluminum is strictly controlled to make it extremely By forming a thin film, a reflector that transmits a part of light is adopted.

[0004]

These reflectors have heretofore been formed by forming fine irregularities on a substrate by a method such as etching or transfer, and then depositing a reflective material such as aluminum on the surface thereof by a method such as vapor deposition. Are manufactured by stacking. Therefore, the manufacturing process is a batch process, and the manufacturing efficiency is not high. In particular, when manufacturing a semi-transmissive reflector, a method of first forming fine irregularities and then removing a part thereof is adopted. Therefore, a manufacturing process is further increased because a new removing step is required to make the film semi-permeable.

Further, in order to secure the reflection efficiency of the reflector, it is required to precisely design the fine irregularities and to manufacture them precisely as designed, but the reflection film in the predetermined places of the fine irregularities is required. It is very difficult to remove only. Further, since fine irregularities are randomly formed in order to prevent the pattern due to the interference light, it is impossible to remove only the reflection film at those predetermined places. Therefore, by making it semi-transmissive, the reflection efficiency of the reflector is inevitably lowered, and it is not possible to make both the reflection efficiency and the semi-transmissivity compatible.

Particularly, in order to precisely control the direction in which external light is reflected and to secure the amount of light, it has been found that a structure in which inclined fine mirror surfaces are randomly arranged is effective. If the reflection film of 1 is removed, the reflection efficiency will be greatly deteriorated.

On the other hand, in the case where the entire film is made semi-transmissive by controlling the film thickness, it is necessary to precisely control the thickness of the reflective film, which results in poor yield and high cost. Further, by making the film thinner, it becomes difficult to accurately reproduce the reflection shape, and it becomes difficult to maintain the reflection efficiency. In addition, since the reflectance is reduced by making the entire structure semi-transmissive, the reflection efficiency is inevitably deteriorated. Further, partially semi-transmissive is a more difficult task than partially removing the reflective film described above, and it is also impossible to specify the location. Therefore, even with this method, it is not possible to manufacture a reflector having both reflection efficiency and semi-transparency at low cost.

Therefore, it is an object of the present invention to provide a method capable of manufacturing a reflector having fine irregularities at low cost. Further, it is an object of the present invention to provide a manufacturing method capable of manufacturing a reflector having high reflection efficiency and high transparency even at a semi-transmissive reflector at low cost.

[0009]

Therefore, in the present invention, unlike a conventional method of manufacturing a reflector using a substrate, a reflector having a fine unevenness on the surface is formed by using a continuous film-shaped member. To manufacture. For this purpose, a film-shaped member is press-molded with fine irregularities by using a mold having fine irregularities formed on the pressing surface.

That is, in the reflector manufacturing method of the present invention, the first mold having a plurality of fine irregularities formed on the pressing surface presses the film material having at least one surface reflective to produce fine irregularities. The process of press molding is adopted. According to this manufacturing method, a part of the continuous film material is pressed by the pressing surface, and by repeating this, it is possible to continuously form a reflector having fine irregularities.
Therefore, unlike the conventional batch processing, it is possible to efficiently mass-produce a film-shaped reflector in which at least one surface is a reflective surface and a plurality of fine irregularities are press-molded and to supply it at low cost. Also, in the press molding process, the method of drawing out the film material rolled into a roll, transferring it, and rewinding it into a roll is adopted to supply the reflector wound in a roll at low cost. it can.

Since fine irregularities of several μm to several tens of μm are formed in the press forming step, the film material can be pressed by sandwiching the film material between the flat base and the first die and pressing. The unevenness can be press-formed with sufficient accuracy by deforming within the range of the film thickness. Alternatively, the base may be made elastic so that it can be easily deformed. In order to further stabilize the fine shape to be press-molded, it is possible to sandwich the film material between the first mold and the second mold having the press surface that complements the press surface of the first mold. In particular, it is effective when the film material is thinned or intermittently made semi-permeable.

Further, in the step of press-molding, it is desirable not to bring the press surface into direct contact with the reflective surface, but to sandwich an appropriate protective agent between the press surface and the film material, which promotes peeling. For example, the protectant is a release agent,
The release can be promoted by applying a release agent on the pressing surface or the film material side, so that the production efficiency is improved and the yield is also improved. The protective agent may be a film that protects the reflective surface of the film material and reduces the adhesion to the press surface. Further, the protective agent may be a surface protective film on the press surface that reduces the adhesiveness to the film material, and materials that reduce the adhesiveness include fluorine-based and silicon-based materials.

The film material may have a one-layer structure such as a metal thin film, or a multi-layer film. The multilayer film may be a reflective film by laminating a semi-transmissive film, or a reflective film such as a metal thin film and a supporting film in consideration of strength or handling convenience. The support film may be laminated. In the case of a film material in which a support film and a reflection film are laminated, the reflection film is sandwiched between a protective film and a support film that weaken the adhesion force between the reflection film and the pressing surface rather than the adhesion force between the support film and the reflection film. It is desirable that the structure is

Further, according to the manufacturing method of the present invention in which the fine unevenness is press-formed on the film material, the shape of the fine unevenness formed on the surface is such that the reflective surface (reflection surface) of the reflector is easily formed. The semi-transmissive portion can be automatically formed by forming the first region and the second region having a shape in which the reflection surface is intermittent or has a shape thinner than the first region. Therefore, at least a part of the unevenness has a reflective area having an inclined mirror surface and a shape that complements the shape of the reflective area, and the reflective surface is intermittent or thinner than the reflective area. The semi-transmissive reflector formed of the non-reflective region including the portion can be mass-produced at a low cost in the same process as the total-reflection reflector.

That is, according to the manufacturing method of the present invention, unlike the conventional method, it is not necessary to make semi-transparent in the subsequent step, and the factor of high cost can be eliminated. Furthermore, since a portion that becomes transparent or semi-transparent can be incorporated in the shape of the unevenness, it is possible to make the shape semi-transparent as designed without breaking the shape of the unevenness. Therefore, even if the irregularities are randomly formed, a desired place becomes transparent or semi-transparent.
Therefore, according to the manufacturing method of the present invention, it is possible to manufacture a high-quality reflector having both reflection efficiency and semi-transparency at low cost.

In this reflector, it is possible to form a first mirror surface for reflecting, condensing or distributing the first incident light from the surface in a desired direction in the reflection area, and to form the first mirror surface from the surface. The reflection efficiency of the incident light of 1, that is, the external light can be improved.
On the other hand, the second incident light from the back surface of the reflector, that is, the light flux from the backlight can be guided to the front surface side from the non-reflective region, and the reflector can be made semi-transmissive. Therefore, it is possible to provide a semi-transmissive reflector having both the reflection efficiency and the transparency. Further, in order to form a large number of reflective regions having the first mirror surface, a shape that complements them is indispensable. Therefore, even if it is used as a non-reflective region, it does not cause a reduction in the efficiency of the reflective regions.

Therefore, by combining the reflector of the present invention, the transmissive display disposed on the front side of the reflector, and the light source disposed on the back side of the reflector, that is, the backlight device. It is possible to provide a display device capable of displaying a bright and clear image by using outside light, and further capable of displaying a bright image even at night by the light of the backlight device.

One of the shapes of the non-reflective area, which complements the shape of the reflective area, is the shape of a gradient opposite to that of the first mirror surface, and the non-reflective area is provided with a transparent or semi-transparent surface of a reverse gradient. Can be provided. The surface of this reverse gradient is a portion that is intermittently transmitted because the non-reflective area easily cracks or cracks even when pressed by making the gradient steep with respect to the gradient of the first mirror surface. , It tends to become a thin film and become a semi-transparent part. Further, in the design in which the top of the reflection area and the bottom of the adjacent reflection area are overlapped with each other, a surface or an intermittent structure facing the reflection area is formed by the reflection areas, so that the reflection areas are separated from each other. The area becomes a non-reflection area.

In order to press such a shape, the first area of the pressing surface is provided with the first inclined surface inclined so as to reflect the incident light from the surface, and the first area is formed in the second area. A second slope having an opposite slope to the slope is provided. The slope or inclination of the second slope is preferably steeper than the slope of the first slope. Further, in the first step, by forming the unevenness so that the top of the first region and the bottom of the adjacent first region overlap, a non-reflection region can be formed between them.

In the reflection area of the reflector, the second incident light which is incident from the back surface side of the reflector and transmitted through the non-reflection area,
That is, a second mirror surface that reflects the light flux from the backlight to the front surface side can be provided. This makes it possible to provide a reflector in which the emission direction of the light flux of the backlight can be further controlled. When the second mirror surface is provided, the external light reflected by the second mirror surface escapes from the non-reflection area.
Since the light from the backlight reflected by the mirror surface of is output to the direction of the user's eyes, there is basically no external light that enters from the direction of the eyes as a back light, and this is a factor that deteriorates the reflection characteristics of the reflector. I won't.

Further, by forming the back surface reflection area for reflecting the light from the backlight toward the non-reflection area, it becomes possible to efficiently guide the light flux output from the backlight to the surface of the reflector. The light usage efficiency can also be improved. This back surface reflection area can be arranged using the back surface of the reflection area.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a mobile phone 1 equipped with a display device 2 according to the present invention. The display device 2 includes a transmissive liquid crystal panel 10 arranged on the front side of the mobile phone 1, a semi-transmissive reflector 20 arranged on the back surface thereof, and a backlight device 3 arranged on the back surface thereof. Is equipped with. Therefore, when there is sunlight or illumination device 70 that illuminates the display device 2, the light (external light or first incident light) 71 from the device is reflected by the reflector 20 to the user 79.
The image displayed on the liquid crystal panel 10 by being reflected as the display light 73 in the direction of is displayed to the user 79. On the other hand, when there is no external light 71 or when the external light 71 is insufficient, the backlight 3 is transmitted through the semi-transmissive reflector 20.
Light (backlight light or second incident light) 72
The liquid crystal panel 10 is illuminated with. Therefore, in an environment with the external light 71, it is possible to display a bright and clear image with low power consumption by using the external light 71. Even in the environment where the external light 71 is absent or insufficient, the backlight light 72 makes the image clear and bright. It is possible to display various images.

FIG. 2 shows a schematic configuration of the display device 2 in an enlarged manner using a cross section. The liquid crystal panel 10 has a structure in which a liquid crystal layer 12 is sandwiched between a pair of glass substrates 11a and 11b.
b between the liquid crystal layer 12 and the pair of alignment films 13a and 13a.
b and a pair of transparent electrodes 14a and 14b are arranged. A pair of polarizing plates 15a and 15b are arranged outside the glass substrates 11a and 11b. When the upper side of FIG. 2 is taken as the front side, the half of the lower side (back side) of the polarizing plate 15b, that is, the rear surface 10b of the liquid crystal panel 10 on which the reflective film 22 is formed on the side facing the liquid crystal panel 10 (front surface). The transmissive reflector 20 is attached, and the backlight 3 is attached to the back side thereof. Therefore, the light flux 71 incident from the front surface 10a side of the liquid crystal panel 10 is reflected toward the front surface 10a by the reflector 20 attached to the back surface 10b, and is output as the display light 73 from the front surface 10a. Further, the light flux 72 from the backlight 3 passes through the reflector 20 and is reflected on the surface 10 of the liquid crystal panel.
It is output as display light 73 from a.

FIG. 3 shows an enlarged cross section of the reflector 20. The reflector 20 is a sheet-shaped member in which a reflecting film 22 is formed by vapor-depositing aluminum, which is a reflecting material, on a surface 21 of a transparent plastic sheet 24. As shown in the plan view of FIG. 4, the unevenness 25 formed on the surface 21 of the reflector 20 of the present example is a unit or pattern 27 having a substantially circular recess having an opening 26 having a diameter of about several microns. Has been formed. This pattern 27
Comprises a reflective area 31 with an inclined mirror surface and a non-reflective area 32 with an inverse inclination to complement the inclined reflective area 31. The reflective region 31 is covered with the reflective film 22, whereas the non-reflective region 32 has no reflective film attached thereto, and thus the transparent plastic sheet 2
4 is appearing. Therefore, the incident light flux 72 from the backlight device 3 installed on the back surface 23 of the reflector 20 is
It can be used as a light flux 73 that illuminates the liquid crystal panel 10 from the surface of the reflector 20 through the non-reflection area 32.

On the other hand, in the reflection area 31, the liquid crystal panel 10 is provided.
There is prepared a portion of the first mirror surface 35 that is inclined at an angle suitable for reflecting the external light 71 that has passed through in the direction of the liquid crystal panel 10. Therefore, when there is the external light 71, the external light 71 can be used as the luminous flux 73 that reflects the external light 71 in the reflection area 31 and illuminates the liquid crystal panel 10.

This reflector 20 is shown in FIGS. 5 (a) and 5 (b).
The manufacturing method of is shown. As shown in FIG. 5A, the raw material 80 of the reflector 20 is a film-shaped member and is supplied in a state of being wound in a roll shape 82. The film-shaped raw material 80 pulled out from the state of the roll 82 is continuously fed to the vacuum device 86. Inside the vacuum device 86, the back surface 80b of the raw material 80 is heated by the heater 87 which also serves as a base having a flat surface, and is sandwiched between the mold 89 and the base 87 under vacuum to continuously press-form fine irregularities. To be done. The product in which the fine irregularities are press-formed, that is, the reflector 20, is taken out from the vacuum device 86 and wound as a product roll 83.

The reflector 20 provided in the form of a roll is cut into an appropriate size according to the size of the liquid crystal panel 10, and is bonded to the back surface of the liquid crystal panel 10 with an adhesive or the like, whereby the above-described display device is obtained. 2 can be manufactured.

The raw material film material 80 has a three-layer structure, and is a transparent plastic film 24 such as a PET film serving as a substrate or a supporting film, and its surface 21.
Further, a reflective thin film (reflective film) 22 having a reflective material such as aluminum vapor-deposited thereon in advance, and a protective layer 81 for protecting the reflective film 22 are provided. The protective layer 81 promotes peeling between the mold 89 and the reflective film 22, and is a layer of a releasing agent or has a releasing property, that is, the plastic film 2
4 is a layer formed of a member having a smaller adhesive force to the mold 89 than the adhesive force to the reflection film 22. As the release agent, there are silicon-based or fluorine-based materials. For silicon, Toshiba Silicone TSM6851 or TSM
6822, Pericoat A or Pericoat BX-2 manufactured by Chukyo Kasei Co., and Metaform CL manufactured by Composite Materials Co. can be used. Further, in the case of a fluorine-based material, Daifree of Daikin Industries, Ltd., McLube of Gunze Sangyo, etc. can be used.

The peeling can also be promoted by applying these release agents to the mold 89 on the pressing surface 88. However, a mechanism for applying to the press surface 88 each time the mold 89 presses is required. Further, when the coating amount becomes unstable, the peeling of the mold 89 becomes incomplete, and the reflector 20
Cause deterioration of the quality. On the other hand, when the protective layer 81 is provided on the raw material film material 80, the pressing surface 8
8 does not require a mechanism for applying a release agent, and since a uniform protective layer 81 is provided on the film material, the mold 89
Can be reliably peeled off.

Instead of applying a release agent as the protective layer 81, a film made of a silicon-based or fluorine-based material can be formed in advance, and the same effect can be obtained. When the reflector 20 having minute irregularities is attached to the back surface of the liquid crystal panel 10, the protective film 81 is used.
Peel off and paste. Therefore, since it can be attached to the liquid crystal panel 10 simply by peeling off the film, it is less troublesome to attach the reflector 20 than removing the applied release agent by a chemical method or the like. Further, since the protective film 81 itself is formed of a material such as silicon or a fluorine-based material that is easily peeled off, it can be easily peeled off from the reflective film 22 and damages the surface of the reflective film 22 on which the minute irregularities are formed. It can be removed without

FIG. 6 shows an enlarged cross section of the pressing surface 88 of the pressing die 89. A plurality of fine irregularities 95 are formed on the pressing surface 88. Of the surfaces of the irregularities 95, the surface having a gentle slope becomes the first region 91 forming the reflection region 31, and the surface having a steep slope. Serves as the second region 92 forming the non-reflection region 32. When the inclination of the second region 92 is steep, the reflection film 2 of the raw material 80 is formed by pressing the shape of the pressing surface 88 onto the film-shaped raw material 80.
2 is broken at the step of the second region 92, and cracks or cracks are generated,
It becomes the transparent part. Alternatively, the reflective film 22 is stretched and thinned at the step of the second region 92 to become semi-transmissive.

Therefore, in the manufacturing method shown in FIG. 5A, the film-shaped raw material 8 continuously supplied.
By pressing the mold 89 to 0 and repeating it, the first mirror surface 35 suitable for reflecting the external light 71 on the surface 21.
It is possible to continuously and efficiently mass-produce the film-shaped reflector 20 in which a large number of the reflection regions 31 provided with are formed. Therefore, it is possible to manufacture the reflector 20 in a short time and supply it at low cost.

Further, in the reflector 20 of this example, in order to form a large number of inclined reflection areas 31, it is necessary to form a fine unevenness 25 by complementing the shape thereof. A semi-transmissive reflector is used as the non-reflective region 32 having a structure inclined to the opposite side or having a reverse gradient. Since the non-reflective region 32 can be formed at the same time as the reflective region 31 with the same mold (press) 89, a semi-transmissive reflector is continuously manufactured with the same man-hours as a total-reflective reflector and supplied at a low cost. can do.

Further, since the portion of the structure which is the non-reflection area 32 and is inclined to the opposite side to the reflection area 31 has a different surface orientation, it does not become a surface which reflects the external light 71 effectively. Therefore, in the reflector 20 of the present example, the region for complementing the reflective region 31 is used as the non-reflective region 32, so that the reflector 20 can be transmissive without lowering the reflection efficiency.

Further, the non-reflective region 3 is a part of the non-reflective region 32 that complements the reflective region 31 to form irregularities.
2 does not erode the reflection region 31, and also in this respect, it is possible to prevent the reflection efficiency of the reflector 20 from decreasing.
Since the non-reflective region 32 is structurally built in, the proportion and shape of the non-reflective region 32 can be incorporated into the design of the reflector 20 at the same level as the reflective region 31. In addition to the reflection performance, the transmission performance can be controlled by the reflection pattern 27, that is, the pattern of the unevenness 95 formed on the pressing surface 88 of the mold 89.

FIG. 7 is a sectional view showing an outline of a different reflector 20 of the present invention. The reflector 20 is manufactured by the same manufacturing method as described above. This reflector 2
The reflection pattern 28 included in 0 also includes an inclined reflection area 31, and the first reflection surface 31 includes a first mirror surface 35 that reflects the external light 71 in a desired direction. In the reflection pattern 28 of this example, the reflection area 31 is formed in a sawtooth shape, and the top 31a of the reflection area 31 overlaps with the bottom 31b of the adjacent reflection area 31. . Therefore, the intermittent portions between the reflection areas 31 have a complementary structure for forming a large number of reflection areas 31, and the portions are the transmissive non-reflection areas 32.

Further, the reflector 20 of this example has the reflective area 3
A reflection area (back surface reflection area) 33 is also formed on the second back surface 23. Then, the second incident light 72 emitted from the backlight device 3 arranged on the back surface 23 is reflected by the back surface reflection area 33 and reaches the surface 21 of the reflector 20 via the transmissive non-reflection area 32. To do. Furthermore, the reflection area 3
A second mirror surface 36 that reflects the light flux 72 in a desired direction is formed on the position 2 on the position where the light flux 72 reflected by the back surface reflection area 33 strikes. Therefore, the incident light 72 emitted from the backlight device 3 is reflected by the back surface reflection area 33,
External light 71 is transmitted through the non-reflection area 32 and the second mirror surface 36.
LCD panel 1 is reflected in almost the same direction as the reflected light.
The light flux 73 illuminates 0.

Therefore, in the reflector 20 of this example, not only the direction in which the external light 71 is reflected by the reflection region 31 but also
The direction in which the light 72 from the backlight 3 is reflected can be controlled, and the light 72 from the backlight 3 can also be output so as to illuminate the liquid crystal panel 10 more efficiently. On the contrary, the external light 71 reflected by the second mirror surface 36
Will be discharged to the back surface 23 through the non-reflection area 32. However, such external light 71 is emitted from the direction of illuminating the liquid crystal panel 10, that is, the direction of the eyes of the user who views the liquid crystal display device 2.
The light is light that does not enter the reflector 20 when the user views the liquid crystal display device 2. Therefore, also in the reflector 20 of this example, it is possible to provide the transparency without affecting the reflection efficiency of the external light 71. Further, since the emission direction of the light flux 72 from the backlight 3 can be easily controlled, the light from the backlight 3 can be used more effectively.

FIG. 8 is a sectional view showing the structure of a different reflector 20 of the present invention. In this reflector 20, fine unevenness 25 is press-formed on the surface 21 of the support film 24 by a plurality of types of reflection patterns 29a to 29d having different optical characteristics to illuminate the liquid crystal panel 10 such as viewing angle and brightness. It is possible to deal with the case where the conditions for the luminous flux 73 to be complicated are complicated. For example, the reflection pattern 29a is a reflection pattern that is convex on the surface 21 formed by the reflection area 31 and the non-reflection area 32. Also,
The reflection pattern 29c includes a reflection area 31 and a non-reflection area 32.
The reflection pattern has a concave surface 21.
In this way, the reflective area 31 and the non-reflective area 32 can be formed in any pattern of unevenness,
In the reflection pattern, the portion not provided with the function of reflecting the external light 71 can be made transmissive or semi-transmissive to form the non-reflective region 32.

As described above, in this example,
A film-like reflective raw material is continuously press-molded by a mold 89 having a first region having a shape of the reflecting surface which is easily formed and a second region where the reflecting surface is not formed or is difficult to be formed. By doing so, the semi-transmissive reflector 20 including the reflective region 31 and the non-reflective region 32 can be continuously manufactured. For this reason, mass productivity becomes extremely high, and it becomes possible to supply a semi-transmissive reflector having good performance at an extremely low cost. Of course, not only a semi-transmissive reflector, but also a reflector having only the first region and in which fine irregularities are formed can be press-molded in the same manner as described above, and a total reflection type reflector is also low in cost. Can be supplied at cost.

In the above description, the raw material in which the protective layer, the reflective film and the support film are multi-layered is described as an example, but a multi-layer film having four or more layers may be used as the raw material. Furthermore, as a raw material, Vikuiti-E manufactured by 3M
It is also possible to use a reflective thin film having a multilayer film structure using a polyester resin such as SR. It is also possible to peel off the reflection film 22 having fine irregularities formed by press molding from the support film 24 and use it as the reflector 20.

Further, in the above-described manufacturing method, the reflector is manufactured by sandwiching it between the flat base 87 and the mold 89. However, the support film 24 in which the base is made elastic by giving elasticity to the base. You may change it including. In addition, a second die having a pressing surface that complements the pressing surface 88 of the first die 89.
It is also possible to form a mold and form a fine concavo-convex by sandwiching the raw material film 80 between the second mold and the first mold, so that the fine shape can be molded more stably. In particular, it is effective when the whole film-shaped raw material is thinned or intermittently made semi-permeable.

As described above, since the reflector 20 can be supplied at a low cost by the manufacturing method of the present invention, the reflector 20 can be supplied.
And the transparent liquid crystal display 10 and the back surface 2 of the reflector 20.
By combining with the light source arranged at 3, that is, the backlight device 3, it is possible to display a bright and clear image using the external light 71.
2 makes it possible to provide a display device 2 that can display a bright image even at night at low cost. In addition, the reflector 20
By combining the transparent liquid crystal display body 10 with the transparent liquid crystal display body 10, it is possible to provide the reflection type display device 2 in which a clear image can be seen at low cost. Further, the display device 2 adopting the reflector 20 of the present invention is suitable not only for the mobile phone 1 but also for other portable information terminals such as a palmtop PC.

[0044]

As described above, according to the present invention, a reflector having a fine concavo-convex pattern is continuously manufactured by press-molding a fine concavo-convex pattern on a reflective film having a reflective film formed continuously. Therefore, it can be supplied at a low cost in a short time. In particular, in the manufacturing method of the present invention, even a semi-transmissive reflector can be manufactured in the same step, and the semi-transmissive reflector can be supplied at low cost.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a mobile phone using a display device of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a display device of the present invention.

FIG. 3 is a sectional view showing an example of a reflector of the present invention.

FIG. 4 is a diagram showing a surface of a reflector shown in FIG.

FIG. 5 is a diagram showing how a reflector is manufactured by pressing.

FIG. 6 is an enlarged view of a press die.

FIG. 7 is a cross-sectional view showing another example of the reflector of the present invention.

FIG. 8 is a cross-sectional view showing still another example of the reflector of the present invention.

[Explanation of symbols]

2 Display device (liquid crystal display device) 3 backlight 10 Liquid crystal panel (display body) 20 reflector 21 reflective surface 22 Reflective film 23 Back side 24 Supporting film 25 unevenness 26 Aperture shape 27, 28, 29 Reflection pattern 80 Raw materials in film form 81 Protective film Type 89 (mold)

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2H042 DA02 DA11 DA16 DA21 DA22                 2H091 FA07X FA07Z FA14Z FA41X                       FA41Z FC26 FC29 GA01                       GA03 GA16 LA12 LA21 LA30                 4F100 AB10 AK41 AR00B AR00C                       BA02 BA03 BA07 BA10B                       BA10C DD01A EJ17A GB41                       JL14C JN01A JN06A                 4F209 AC03 AD20 AF01 AG01 AG03                       AG05 AH33 AH73 AH78 PA02                       PA08 PB02 PC01 PC05 PG05                       PN06 PN07 PQ09 PQ11

Claims (31)

[Claims] 1. A reflector having a step of pressing a film material having at least one surface having reflectivity by a first mold having a plurality of minute unevenness formed on a pressing surface to press-mold the minute unevenness. Production method. 2. The method for manufacturing a reflector according to claim 1, wherein in the press-molding step, a part of the continuous film material is pressed by the press surface and repeated. 3. The method for manufacturing a reflector according to claim 2, wherein, in the press-molding step, the film material is wound into a roll, transferred to the film material, and rewound into a roll. 4. The press molding step according to claim 1, wherein the film material is sandwiched between a first mold and a second mold having a pressing surface that complements the pressing surface of the first mold. Method of manufacturing reflector. 5. The method for manufacturing a reflector according to claim 1, wherein in the press-molding step, a protective agent that promotes peeling is sandwiched between the pressed surface and the film material. 6. The method for manufacturing a reflector according to claim 5, wherein the protective agent is a release agent. 7. The method for manufacturing a reflector according to claim 5, wherein the protective agent is a protective film that covers a reflective surface of the film material. 8. The method for manufacturing a reflector according to claim 5, wherein the protective agent is a surface protective film for the pressing surface. 9. The method for manufacturing a reflector according to claim 1, wherein the film material is a multilayer film. 10. The method for manufacturing a reflector according to claim 9, wherein the film material includes a reflective film and a support film supporting the reflective film, which are laminated. 11. The method of manufacturing a reflector according to claim 10, wherein the reflective film is sandwiched between the support film and a protective film having a weak adhesion to the pressing surface. 12. The at least part of the unevenness of the pressed surface according to claim 1, wherein the reflective surface of the reflector is easily formed, and the reflective surface of the reflector. Is formed by a second region having a shape that is intermittent or thinner than the first region. 13. The method of manufacturing a reflector according to claim 12, wherein the second region has a shape that complements the shape of the first region. 14. The method according to claim 12, wherein the first region has a first slope inclined to reflect the first incident light from the surface, and the second region has the first slope. The method for manufacturing a reflector, comprising a second slope having an inverse slope to that of the slope. 15. The method of manufacturing a reflector according to claim 14, wherein the slope of the second slope is steep with respect to the slope of the first slope. 16. The method of manufacturing a reflector according to claim 12, wherein the top of the first region and the bottom of the adjacent first region are overlapped with each other. 17. At least one surface is a reflective surface,
A film-shaped reflector with multiple fine irregularities press-molded. 18. The reflector according to claim 17, which is wound in a roll shape. 19. The reflector according to claim 17, which is a multilayer structure. 20. The reflector according to claim 17, wherein a reflective film and a support film supporting the reflective film are laminated. 21. The reflector according to claim 20, wherein the reflective film is sandwiched between the support film and a protective film having a weak adhesion to the pressing surface. 22. The reflective surface of the reflector according to claim 17, wherein at least a part of the unevenness is a reflection area having an inclined mirror surface and a shape that complements the shape of the reflection area. A reflector formed of a non-reflective region having a transmissive or semi-transmissive transmissive portion that is thinner than the region. 23. The reflector according to claim 22, wherein the reflection region has a first mirror surface that reflects the first incident light from the surface. 24. The reflector according to claim 23, wherein the non-reflective region has a transmissive or semi-transmissive transmissive surface having a gradient opposite to that of the first mirror surface. 25. The reflector according to claim 24, wherein the transmission surface has a steep slope with respect to the slope of the first mirror surface. 26. The reflector according to claim 22, wherein a top portion of the reflection area and a bottom portion of the adjacent reflection area overlap each other. 27. The reflective area according to claim 22, wherein the reflective area includes a second mirror surface that reflects, to the front surface side, second incident light that is incident from the back surface side of the reflector and transmitted through the non-reflective area. A reflector. 28. The reflector according to claim 22, wherein a back surface reflection area for reflecting second incident light incident from the back surface side of the reflector toward the non-reflection area is formed. 29. The reflector according to claim 28, wherein at least a part of the back surface of the reflection area serves as the back surface reflection area. 30. The reflector according to claim 28, wherein the reflection area includes a second mirror surface that reflects the second incident light that has passed through the non-reflection area toward the front surface side. 31. A display device comprising the reflector according to claim 17 and a transmissive display disposed on the front surface side of the reflector.