JP5271729B2 - Display device with input function and electronic device - Google Patents

Description

  The present invention relates to a display device with an input function including a touch panel capable of detecting a position touched by a finger or the like, and an electronic apparatus including the display device with an input function.

  In recent years, in electronic devices such as mobile phones, car navigation systems, personal computers, ticket vending machines, and bank ATM terminals, displayed images, designs, characters, etc. (hereinafter collectively referred to as images) are pressed with a finger or the like. Thus, predetermined information is input to the electronic device. As this input means, a display device with an input function, which includes a display panel and a touch panel arranged in a planar manner on the display surface of the display panel, is often used. In such a display device with an input function, the displayed image is always displayed so that the operator of the touch panel can visually confirm the content of the image displayed on the display surface and reliably press the corresponding portion of the touch panel. It is important that the screen is displayed so that the operator can easily see it.

  By the way, in such a display device with an input function, since the surface of the touch panel is operated by pressing with a finger, the fingerprint of the operator's finger may adhere to the pressed position. Then, the displayed image is difficult to see due to the fingerprint attached to the operator. Thus, for example, Patent Document 1 discloses a technique for suppressing surface reflection and making it difficult to see attached fingerprints by forming an uneven shape on the surface of the touch panel (also referred to as anti-glare treatment).

JP 2008-96781 A

  A rough pitch is usually preferred for the uneven shape that makes it difficult to see such fingerprints. By the way, in recent years, the resolution of displayed images has been increased, and in the display panel, a plurality of pixels having a fine pixel pitch are provided in the display area of the image, and there are many cases where this highly-defined image is displayed. ing. In such a case, due to the rough pitch of the uneven shape provided on the touch panel and the fine pitch of the pixels in the image display area, the display light passing through the pixels causes interference, and the displayed image is displayed to the operator. On the other hand, it was confirmed that there was a problem of giving a glaring feeling. For this reason, the subject that the displayed image became difficult to see has arisen.

The present invention has been made to solve at least part of the problems described above, it can be implemented deliberately following form.

A display device with an input function according to the present invention is a display device with an input function that includes a display panel having a display area, and a touch panel that is disposed so as to overlap with at least a part of the display area. , formed on the surface of the touch panel located on the opposite side of the table display region, between the first light diffusing means having a first uneven shape for diffusing the light emitted from the display area, the display area and the data touch panel And a second light diffusing means for diffusing the light emitted from the display area and emitting the diffused light to the touch panel, wherein the first concavo-convex shape is the display area. The second concavo-convex shape is formed with a pitch finer than the first concavo-convex shape .

  According to this configuration, the first uneven shape can make the fingerprint difficult to see, and the second uneven shape can suppress the interference of the display light. It is possible to obtain an image that does not give a glaring glare.

Upper fill force capable display device, the second light diffusing means, it is preferable that the second uneven shape is formed on the surface facing the motor touch panel.

  According to this configuration, it is possible to suppress glare of the display image and to suppress light reflection that occurs on the surface of the light diffusion plate located on the operator side. Therefore, it is possible to suppress the displayed image from becoming difficult to see.

Upper fill force capable display device, pitch of the second uneven shape is preferably 2 times or less of the pitch 0.5 times or more relative to the picture element pitch.

  According to this configuration, it is possible to form an appropriate uneven pitch that does not give a glare to the pixel pitch. Therefore, it is possible to suppress the displayed image from becoming difficult to see.

Upper fill force capable display device, the second light diffusing means, the scattered light transmittance as the haze value representing the divided by the total light transmittance in percentage is in the range of 20% to 50% It is preferable to form the second uneven shape .

According to this configuration, it is possible to provide the second light diffusing unit in which the concavo-convex shape is formed in a range in which the display image is not easily seen and the range in which the glare is suppressed.

Upper fill force capable display device preferably display panel is a liquid crystal panel for optically modulating by using a change in the arrangement direction of liquid crystal molecules.

  A liquid crystal panel is a display panel that can be thinned and consumes less power. Accordingly, the liquid crystal panel is suitable as a display panel for a display device with an input function that is thin and consumes low power.

Upper fill force capable display device, it is preferable that the second light diffusing means is provided on the polarizing plate in which the liquid crystal panel is provided.

According to this configuration, since the polarizing plate normally provided in the liquid crystal panel is used as the second light diffusion means, an increase in the total thickness of the display device with an input function can be suppressed.

In addition, an electronic apparatus including the display device with an input function is provided .

  According to this configuration, there is provided an electronic apparatus including a display device with an input function that is suppressed so that a displayed image is not easily seen by a fingerprint and does not give a glare to an operator. be able to.

  Hereinafter, the present invention will be described based on examples. It should be noted that the drawings used in the following description may be exaggerated for the sake of description, and needless to say, they do not necessarily indicate the actual size or length.

(Configuration of display device with input function)
A display device with an input function 100 according to an embodiment to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a perspective view schematically showing a schematic configuration of a display device 100 with an input function. FIG. 2 is a cross-sectional view schematically showing a main cross section of the display device with an input function 100 shown in FIG.

  As shown in FIGS. 1 and 2, the display device with an input function 100 according to the present embodiment includes a liquid crystal panel 5 as a display panel, and a side on which the display light (open arrow in the figure) is emitted from the liquid crystal panel 5. The touch panel 1 arranged so as to overlap the surface has a structure in which the spacer 3 is sandwiched therebetween. In the present embodiment, the liquid crystal panel 5 is a transmissive active matrix liquid crystal panel, and is provided with an image display area 110 as a display area composed of a plurality of pixels. In addition, a backlight device (not shown) is disposed on the side opposite to the display light emission side.

  The liquid crystal panel 5 includes a light-transmitting element substrate 50, a light-transmitting counter substrate 60 bonded to the element substrate 50 with a sealing material 70 in a state of being disposed opposite to the element substrate 50, and the counter substrate 60 and the element substrate 50. And a liquid crystal layer 75 held between them. In addition, the first polarizing plate 80 is disposed on the display light emission side, and the second polarizing plate 90 is disposed on the opposite side. In the element substrate 50, a flexible substrate 73 for inputting a predetermined signal for displaying an image on the liquid crystal panel 5 is connected to an overhang region that projects from the edge of the counter substrate 60.

  The element substrate 50 is formed with a pixel electrode, a counter electrode, a switching element, or the like for applying an electric field that changes the alignment direction of the liquid crystal molecules of the liquid crystal layer 75 according to the image to be displayed on the substrate surface on the liquid crystal layer 75 side. Has been. In the present embodiment, these are simply displayed as the functional layer 55 in FIG.

  Similarly, as shown in FIG. 2, the counter substrate 60 has R (red), G (green), and B (blue) color filter regions partitioned by a light shielding layer (BM) on the substrate surface on the liquid crystal layer 75 side. The filter layer 65 having the above is formed in a predetermined arrangement. Therefore, after the light emitted from the backlight device passes through each color filter, it is light-modulated according to the change in the alignment direction of the liquid crystal molecules in the liquid crystal layer 75, and becomes display light having a predetermined brightness. The light is emitted from one polarizing plate 80 toward the touch panel 1. In this embodiment, the area where the filter layers 65 are arranged corresponds to the image display area 110, and the arrangement pitch of the filter layers 65 corresponds to the pixel pitch of the pixels formed in the image display area 110.

  The touch panel 1 is of a resistance film type, and a translucent first substrate 10 having a translucent first electrode 15 made of an ITO film (Indium Tin Oxide) formed on the inner surface, and a translucent light made of an ITO film. The sealing material 30 is disposed so that the first electrode 15 and the second electrode 25 face each other with a predetermined gap between the translucent second substrate 20 having the second electrode 25 formed on the inner surface. It is formed by bonding. Therefore, the inside is an air layer.

  As the first substrate 10 and the second substrate 20, a thin plastic substrate or a thin glass substrate having translucency can be used. In this embodiment, both the first substrate 10 and the second substrate 20 are made of thin glass. A substrate is used. In the first substrate 10, a flexible substrate 33 for outputting an information signal indicating a location where the first electrode 15 and the second electrode 25 are in contact with each other is connected to an overhang region that projects from the edge of the second substrate 20. ing.

  In FIG. 2, the first electrode 15 and the second electrode 25 of the touch panel 1 or the pixel electrode and the counter electrode of the liquid crystal panel 5 are formed in a predetermined pattern shape. It is shown with a solid line.

  The touch panel 1 configured as described above is arranged so as to overlap the first polarizing plate 80 of the liquid crystal panel 5 with the spacer 3 interposed therebetween with an adhesive or the like, thereby configuring the display device 100 with an input function. In the display device with an input function 100, the liquid crystal panel 5 can display a moving image and a still image in the image display area 110. By displaying these images, an instruction image when inputting via the touch panel 1 is displayed. Is displayed. Therefore, if the user presses the touch panel 1 with a finger while viewing the instruction image displayed on the liquid crystal panel 5, the second substrate 20 is bent at the pressed position, and the first electrode 15, the second electrode 25, Touch. Therefore, if the location where the first electrode 15 and the second electrode 25 are in contact with each other is detected, the input information can be determined.

  In the display device with an input function 100 configured in this way, as described above, in order to make a finger mark (such as a fingerprint) invisible when the touch panel 1 is pressed, An uneven shape 22 is formed on the surface). The concavo-convex shape 22 is formed with an average pitch between the convex portions (or between the concave portions) at a pitch at which a finger mark (such as a fingerprint) at the time of pressing is less noticeable. Incidentally, in this embodiment, the average pitch of the concavo-convex shape 22 is formed to be about three times the pixel pitch.

  The display device with an input function 100 according to the present embodiment includes a surface on the side where display light is emitted, that is, the touch panel 1 in the first polarizing plate 80 of the liquid crystal panel 5 in addition to the outer surface of the second substrate 20 of the touch panel 1. An uneven shape 82 is formed on the surface on the opposite side. The uneven shape 82 is formed such that the average pitch between the convex portions (or the concave portions) is smaller than the average pitch of the uneven shape 22. Incidentally, in this embodiment, the average pitch of the concavo-convex shape 82 is formed to be about 0.5 times the pixel pitch. Thus, by forming the concave and convex shapes 82 at a finer pitch than the concave and convex shapes 22, as described above, it is possible to suppress the glare that occurs in the display image displayed in the image display area 110. That is, in this embodiment, the first polarizing plate 80 is provided with light diffusing means by forming the concave / convex shape 82 having an average pitch smaller than the average pitch of the concave / convex shape 22, and this is provided with the image display region 110 and the touch panel. By disposing it between the two, it is possible to suppress the glare generated in the display image.

(Explanation of suppression of glare)
Here, suppression of the glare generated in the display image will be described with reference to FIG. Note that, in FIG. 2 and the drawings used in the description of the present embodiment and the following modifications, all the uneven shapes are illustrated with an average pitch for easy description.

  FIG. 3A is a schematic diagram illustrating how display light is diffused when the uneven shape 82 is not formed in the first polarizing plate 80. FIG. 3B is a schematic diagram showing how display light is diffused when the uneven shape 82 is formed in the first polarizing plate 80.

  First, as shown in FIG. 3A, when the concave / convex shape 82 is not formed on the first polarizing plate 80, each of the R, G, B display lights emitted from the backlight and passing through the filter layer 65 is The light travels straight in the state of parallel light and is incident on the second substrate 20 without being diffused by one polarizing plate 80. At this time, since the concavo-convex shape 22 is formed at a pitch three times the pixel pitch, each display light that has passed through the R, G, and B filter layers 65 is diffused so that the luminous flux is directed in approximately the same direction. Will be. That is, the R, G, and B display lights that have passed through the pixels are emitted by being tilted in different directions, each being a group of luminous fluxes having a region for each pixel. Therefore, in the image display area 110, the light beams of R, G, and B display light are not uniformly dispersed but are biased and overlapped, and thus light intensity is generated. As a result, the display image becomes an image that gives a visual glare to the operator.

  On the other hand, as shown in FIG. 3B, when the concave and convex shape 82 is formed on the first polarizing plate 80, each display of R, G, B emitted from the backlight and passed through the filter layer 65. The light is diffused in the first polarizing plate 80 and enters the second substrate 20 as scattered light corresponding to the uneven shape. In this case, the concave-convex shape 22 formed on the second substrate 20 has a pitch three times the pixel pitch, but since the incident R, G, B display light is diffused light, the second substrate 20 The luminous fluxes of R, G, B display light emitted from the light are not emitted in one direction as a group for each pixel, but are emitted in various directions as scattered light. As a result, in the image display area 110, the luminous fluxes of the R, G, and B display lights are mixed uniformly, so that the intensity of light hardly occurs. Therefore, the display image can be suppressed to an image that does not give a visual glare to the operator.

  In this embodiment, the average pitch of the concavo-convex shape 82 is 0.5 times the pixel pitch. However, as is clear from the above description, if the pitch is finer than the average pitch of the concavo-convex shape 22, R, It can be seen that the display lights G and B are diffused in the first polarizing plate 80. On the other hand, when the average pitch of the concavo-convex shape 82 is 0.5 times or less of the pixel pitch, there is a problem that it becomes difficult to form the concavo-convex shape because the interval between the convex portions or the concave portions becomes narrow. Therefore, the first polarizing plate 80 in which the average pitch of the uneven shape was actually changed in this example was made as a prototype, and the average pitch at which a display image with a visually suppressed glare was obtained for the operator was examined. . As a result, it was confirmed that an uneven shape having an average pitch of 0.5 to 2 times the pixel pitch is preferable.

  As apparent from the description of FIG. 3, if the spread (that is, the diffusivity) of the display light beam due to the uneven shape 82 is large in the first polarizing plate 80, the diffusivity of the display light that has passed through the second substrate 20. Will also grow. As a result, the display light emitted in the substantially normal direction of the image display area 110 is reduced and the transmittance is lowered, so that the display image observed by the operator becomes dark. Further, since the display light becomes scattered light, the display image becomes a blurred image.

  Therefore, in this embodiment, it is preferable to adjust the diffusivity within a range in which a display image that does not give the operator a visual glare is obtained. Specifically, it can be adjusted by changing the height between the irregularities of the irregular shape 82 formed on the first polarizing plate 80. This will be described with reference to FIG. 4A is a schematic diagram showing a part of each of the first polarizing plate 80 and the filter layer 65 in FIG. 3, and FIG. 4B is an uneven shape 82 shown in FIG. 4A. FIG. 6 is a schematic diagram showing a state in which an uneven shape 82 a having a lower height between the unevenness is formed on the first polarizing plate 80.

  As shown in the figure, the R, G, and B display light passing through the first polarizing plate 80 spreads the light beam in principle in the concave / convex shape 82a where the height between the concave / convex portions is lower than that of the concave / convex shape 82. And the amount of light that goes straight increases. Therefore, the diffusivity of the display light that has passed through the second substrate 20 is reduced, and the reduction rate of the display light emitted in the substantially normal direction of the image display region 110 is suppressed. As a result, since the decrease in transmittance is suppressed, the display image observed by the operator is not dark and the image is less blurred.

  In the present embodiment, the diffusivity (height between irregularities) of the irregular shape 82 formed on the first polarizing plate 80 is defined by a known haze value. The unevenness actually formed on the surface of the first polarizing plate 80 is often an irregular random shape. Therefore, since it is difficult to define the height between irregularities with one value, in this example, the haze value expressed as a percentage obtained by dividing the scattered light transmittance by the total light transmittance is used. The diffusivity is uneven.

  As is clear from the above description, the haze value is small when the light diffusion is reduced, causing a glare in the display image, and if the haze value is large, the light image is blurred and the display image is blurred. become. In view of this, the first polarizing plate 80 in which the uneven shape is actually changed in this embodiment is made as a prototype, and the display image observed by the operator is not darkened and blurred without giving the operator a visual glare. A range of haze values capable of obtaining a small display image was examined. As a result, it was confirmed that an uneven shape having a haze value of 20% or more and 50% or less may be formed. It was further confirmed that an uneven shape having a haze value of 40% or more and 50% or less is more preferably formed. In addition, the thickness of the 1st polarizing plate 80 used at this time is about 0.1-0.3 mm.

  Further, in this embodiment, as shown in FIG. 2, in the first polarizing plate 80 constituting the liquid crystal panel 5, the uneven shape 82 is formed on the surface facing the touch panel 1. Therefore, the 1st polarizing plate 80 in which the uneven | corrugated shape 82 was formed is arrange | positioned between the liquid crystal panel 5 and the touchscreen 1, and it is a distance nearer than the uneven | corrugated shape 22 with respect to the display image in the liquid crystal panel 5. This diffuses the display light. As a result, the display light emitted from the display surface is effectively diffused for each pixel.

  This effect will be described with reference to FIG. FIG. 5 is a schematic view showing a part of each of the first polarizing plate 80 and the filter layer 65 in FIG. FIG. 5A shows a state in which the first polarizing plate 80 and the filter layer 65 are formed at a distance S1, and FIG. 5B shows the state between the first polarizing plate 80 and the filter layer 65. FIG. 5 shows a state formed at a distance S2 farther than the distance S1 shown in FIG.

  Here, it is considered that the R, G, and B display lights that pass through the filter layer 65 and then enter the first polarizing plate 80 are actually generated with a considerable spread of the luminous flux. Therefore, the oblique luminous flux other than the straight traveling increases with the distance. At this time, as shown in FIG. 5A, when the distance S1 is a small value, each of the R, G, and B display lights that have passed through the filter layer 65 is substantially the same as the straight light in which the luminous flux is not spread. Can be considered. Accordingly, the diffusivity of the display light that has passed through the second substrate 20 has a value corresponding to the uneven shape 82.

  On the other hand, when the distance S2 is a large value, oblique light beams other than straight travel increase in the R, G, and B display lights that pass through the filter layer 65 and then enter the first polarizing plate 80. Therefore, as shown in FIG. 5B, the diffusivity of the display light that has passed through the second substrate 20 becomes larger than the value corresponding to the uneven shape 82. In addition, the light beams of R, G, and B display light may be mixed with each other at the time of incidence on the first polarizing plate 80 between the pixels. As a result, the display light of R, G, and B cannot be individually diffused but diffused in a mixed state, so that the display image observed by the operator is a more blurred image. It is easy to become.

  Therefore, in this embodiment, in order to minimize the distance from the filter layer 65, the uneven shape 82 is formed on the first polarizing plate 80 as described above. By doing so, each of the R, G, and B display lights can be individually diffused, so that the display light can be effectively diffused.

  Further, in this embodiment, since the concave and convex shape 82 is formed on the surface of the first polarizing plate 80 facing the touch panel 1, regular reflection of external light incident on the liquid crystal panel 5 from the operator side, that is, the touch panel 1 side. Can be suppressed. Specifically, when external light is reflected on the surface of the first polarizing plate 80, regular reflection can be suppressed by irregular reflection by the concavo-convex shape 82. Therefore, it is possible to suppress the problem that the display image displayed in the image display area 110 is difficult to see due to reflection of external light.

[Electronics]
Next, an electronic apparatus including the display device with an input function 100 according to the above-described embodiment will be described. FIG. 6A shows a configuration of a mobile personal computer including the display device 100 with an input function. The personal computer 2000 includes a display device with an input function 100 as a display unit and a main body 2010. The main body 2010 is provided with a power switch 2001 and a keyboard 2002.

  FIG. 6B shows a configuration of a mobile phone including the display device 100 with an input function. The cellular phone 3000 includes a plurality of operation buttons 3001, scroll buttons 3002, and the display device 100 with an input function as a display unit. By operating the scroll button 3002, the screen displayed on the display device with an input function 100 is scrolled.

  FIG. 6C shows a configuration of a portable information terminal (PDA: Personal Digital Assistants) provided with the display device 100 with an input function. The information portable terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and the display device 100 with an input function as a display unit. When the power switch 4002 is operated, various kinds of information such as an address book and a schedule book are displayed on the display device 100 with an input function.

  In addition to the one shown in FIG. 6, the electronic apparatus provided with the display device with an input function 100 is a digital still camera, a liquid crystal television, a viewfinder type or a direct view type video tape recorder, a car navigation device, a pager, and an electronic notebook. Calculators, word processors, workstations, videophones, POS terminals, etc. Of course, the display device 100 with an input function described above can be provided as a display unit of these various electronic devices.

  The embodiments of the present invention have been described using the embodiments. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the spirit of the present invention. Of course. Hereinafter, a modification will be described.

(First modification)
In the above embodiment, the first polarizing plate 80 is provided with the light diffusing means by forming the concave and convex shape 82 on the surface facing the touch panel 1. However, the present invention is not limited to this. For example, an uneven shape may be formed on the surface opposite to the surface facing the touch panel 1. This modification will be described with reference to FIG.

  FIG. 7 is a cross-sectional view schematically showing main cross sections of the display device with an input function 100a of the present modification. The display device with an input function 100a includes a first polarizing plate 80 in which a concavo-convex shape 82 is formed on the surface facing the element substrate 50 as compared with the display device with an input function 100 of the above embodiment shown in FIG. This is provided by being attached to the substrate 50. Accordingly, the components of the display device with an input function 100a are the same as those of the display device with an input function 100 (FIG. 2) of the above-described embodiment. explain.

  As shown in the figure, in the present modification, the uneven shape 82 formed on the first polarizing plate 80 is on the element substrate 50 side, and thus approaches the filter layer 65. As a result, as described above, the display light that has passed through the filter layer 65 can be scattered in a state where the luminous flux does not further spread. Therefore, it is possible to appropriately diffuse each of the R, G, and B display lights with a diffusion degree that conforms to the uneven shape. As a result, although it is difficult to suppress regular reflection of external light, the display image observed by the operator does not become dark and is not blurred without giving the operator a visual glare. Can be expected to get more accurate.

(Second modification)
In the above embodiment, the first polarizing plate 80 is formed with a concavo-convex shape, but it is needless to say that the present invention is not limited to this. For example, another diffusing member in which an uneven shape is formed on the surface facing the touch panel 1 may be provided between the first polarizing plate 80 and the touch panel 1. This modification will be described with reference to FIG.

  FIG. 8 is a cross-sectional view schematically showing a main cross section of the display device with an input function 100b of this modification. The display device with an input function 100b is obtained by adding a diffusion plate 85 as a diffusion member to the display device with an input function 100 of the embodiment shown in FIG. Accordingly, only the diffusion plate 85 will be described here, and the other components will be denoted by the same reference numerals as those in FIG. 2 and description thereof will be omitted.

  As shown in the drawing, the diffusion plate 85 is attached to the liquid crystal panel 5 (first polarizing plate 80) using a translucent adhesive or the like in a region surrounded by the spacer 3. As the diffusion plate 85, a light-transmitting resin plate or glass plate can be used. The surface of the diffusion plate 85 facing the touch panel 1 is averaged as described in the above-described embodiment by chemical processing (for example, etching), mechanical processing (for example, collision processing of resin particles) or coating processing. An uneven shape having a pitch and a haze value is formed.

  Since the first polarizing plate 80 is usually a high-priced material because a special material such as a stretched material is used, if the formation yield of the concavo-convex shape is low, there is a risk of increasing the cost. On the other hand, since the present modification includes the diffusion plate 85 which is a different member from the first polarizing plate 80, there is a demerit that the total thickness of the display device with an input function 100b is increased. Since it can be formed with a material cheaper than one polarizing plate 80, even when the formation yield of the concavo-convex shape is low, an increase in cost can be suppressed.

(Third Modification)
In the above embodiment, in the first polarizing plate 80, the concave / convex shape 82 is formed on one side of the surface facing the touch panel 1. However, the present invention is not limited to this. For example, an uneven shape may be formed on the surface opposite to the surface facing the touch panel 1, and the uneven shape may be formed on both surfaces of the first polarizing plate 80. This modification will be described with reference to FIG.

  FIG. 9 is a cross-sectional view schematically showing a main cross section of a display device with an input function 100c as an example of this modification. The display device with an input function 100c is provided with an addition of a diffusion plate 85a as a diffusion member to the display device with an input function 100 of the above-described embodiment shown in FIG. is there. Accordingly, only the diffusion plate 85a will be described here, and the other components will be denoted by the same reference numerals as those in FIG. 2 and description thereof will be omitted.

  As illustrated, the diffusion plate 85a is attached to the liquid crystal panel 5 (first polarizing plate 80) using an adhesive or the like in a region surrounded by the spacer 3. As the diffusion plate 85a, a light-transmitting resin plate or glass plate can be used. And the uneven | corrugated shape which has a predetermined | prescribed average pitch and the height between unevenness | corrugation is each formed in both surfaces of the diffusion plate 85a by the etching process, machining, etc.

  According to this modification, a shape equivalent to the uneven shape having the average pitch and haze value described in the above-described embodiments can be formed by the two uneven shapes formed on both surfaces of the diffusion plate 85a. For example, the above-described implementation is achieved by forming the concavo-convex shape about half the height between the concavo-convex shapes of the concavo-convex shape 82 formed on the first polarizing plate 80 of the above-described embodiment on both surfaces of the diffusion plate 85a. The uneven | corrugated shape which has a haze value equivalent to the haze value demonstrated in the example can be formed. Alternatively, the above-described embodiment has been described by forming the concavo-convex shape of about half the average pitch of the concavo-convex shape 82 formed on the first polarizing plate 80 of the above-described embodiment on both surfaces of the diffusion plate 85a. An uneven shape having a pitch equivalent to the average pitch can be formed.

  Therefore, according to this modified example, although it is necessary to form on both sides, it is only necessary to form a concavo-convex shape with a rough average pitch or a low height between the concavo-convex shapes on each surface. There is an effect that the work becomes easy. Of course, this modification can be applied to the first polarizing plate 80 of the above-described embodiment.

  In addition, according to the present modification, the uneven shape formed on both surfaces of the diffusion plate 85a may be a rough average pitch, and therefore the average pitch is not necessarily smaller than the average pitch 22 formed on the touch panel 1. Of course, it is not limited to.

(Other variations)
In the above-described embodiments, the display panel is described as a liquid crystal panel that can be reduced in thickness and has low power consumption. However, the present invention is not limited to this. For example, a display body using organic or inorganic electroluminescence (EL) or an electro-hydraulic element, or a display body using plasma or a CRT method may be used as the display panel.

The perspective view which showed typically the structure of the display apparatus with an input function of an Example. Sectional drawing which showed typically the main cross section of the display apparatus with an input function of a present Example. It is a schematic diagram which shows the diffusion condition of display light, (a) is a figure which shows the case where uneven | corrugated shape is not formed in a polarizing plate, (b) is the case where uneven | corrugated shape is formed in a polarizing plate. It is a schematic diagram which shows the diffusion condition of display light, (a) is the state where the uneven | corrugated shape with the high height between unevenness | corrugations was formed in the polarizing plate, (b) is the uneven | corrugated shape with the low height between unevenness | corrugations in a polarizing plate. The figure which shows the formed state. It is a schematic diagram which shows the diffusion condition of display light, (a) is a figure which shows the case where a filter layer and a polarizing plate are near, (b) is the case where a filter layer and a polarizing plate are far. FIG. 4 is an electronic device including a display device with an input function, in which (a) is a mobile personal computer, (b) is a mobile phone, and (c) is a schematic diagram showing a configuration of an information portable terminal. The schematic cross section which showed the main cross sections of the display apparatus with an input function of a 1st modification. The schematic cross section which showed the main cross sections of the display apparatus with an input function of a 2nd modification. The schematic cross section which showed the main cross sections of the display apparatus with an input function of a 3rd modification.

  DESCRIPTION OF SYMBOLS 1 ... Touch panel, 3 ... Spacer, 5 ... Liquid crystal panel, 10 ... 1st board | substrate, 15 ... 1st electrode, 20 ... 2nd board | substrate, 22 ... Uneven shape, 25 ... 2nd electrode, 30 ... Sealing material, 33 ... Flexible Substrate, 50 ... element substrate, 55 ... functional layer, 60 ... counter substrate, 65 ... filter layer, 70 ... sealing material, 73 ... flexible substrate, 75 ... liquid crystal layer, 80 ... first polarizing plate, 82, 82a ... uneven shape 85, 85a ... diffusion plate, 90 ... second polarizing plate, 100, 100a, 100b, 100c ... display device with input function, 110 ... image display area, 2000 ... personal computer, 2001 ... power switch, 2002 ... keyboard, 2010 ... Main unit, 3000 ... Mobile phone, 3001 ... Operation button, 3002 ... Scroll button, 4000 ... Information portable terminal, 4001 ... Operation button , 4002 ... power switch.

Claims (7)

A display device with an input function, comprising: a display panel having a display area; and a touch panel arranged to overlap with at least a part of the display area,
Formed on the surface of the touch panel located opposite the front Symbol display region, and the first light diffusing means having a first uneven shape for diffusing the light emitted from the display area,
A second light diffusing unit that is formed between the display region and the touch panel , has a second uneven shape for diffusing the light emitted from the display region, and emits the diffused light to the touch panel;
With
The first concavo-convex shape is formed at a pitch that is coarser than the pixel pitch of the pixels arranged in the display area, and the second concavo-convex shape is formed at a pitch finer than the first concavo-convex shape,
Display device with input function. The display device with an input function according to claim 1,
The display device with an input function, wherein the second light diffusing unit has the second uneven shape formed on a surface facing the touch panel. The display device with an input function according to claim 1 or 2,
  The pitch of the second uneven shape is not less than 0.5 times and not more than 2 times the pixel pitch.
A display device with an input function that is a pitch. A display device with an input function according to any one of claims 1 to 3,
  The second light diffusing means forms the second concavo-convex shape so that the haze value expressed as a percentage obtained by dividing the scattered light transmittance by the total light transmittance is in a range of 20% to 50%. A display device with an input function. A display device with an input function according to any one of claims 1 to 4,
  The display panel with an input function, wherein the display panel is a liquid crystal panel that modulates light by utilizing a change in the alignment direction of liquid crystal molecules. The display device with an input function according to claim 5,
The display device with an input function, wherein the second light diffusion means is provided on a polarizing plate provided in the liquid crystal panel. The electronic device provided with the display apparatus with an input function as described in any one of Claims 1 thru | or 6.