JPH10197852A - Liquid crystal display element provided with input function, and electronic instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid crystal display element free from the occurrence of color unevenness on a display part against the change in temperature and humidity by forming plural opening parts in a board on which a laying electrode is formed and forming a gap between one board and the opening part. SOLUTION: The insulating laying electrode supporting bodies 12 and 15 on which the laying electrode 14 for a touch panel is formed, an upper board 1 and a lower board 4 are fixed by adhesive layers 11 and 16, and the laying electrode 14 is electrically connected to the electrode terminal 5 of the lower substrate 4 through conducive material 17, and simultaneously, fixed. In this case, the adhesive layer does not exit between the upper board 1 placed opposite to the electrically connected part and the insulating supporting body 12, so that the gap is formed, then, the electrically connected part is not fixed to the upper board 1. The upper board 1 is not directly fixed to the lower board 4, but, fixed to the board 4 through the adhesive layers 11 and 16, then, a phase difference is prevented from being partially generated even in the case an expansion/contraction force is applied on the boards 1 and 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having an input function, and further relates to an O.D.
The present invention relates to electronic devices such as A devices, measuring devices, and portable devices.

[0002]

2. Description of the Related Art An optically anisotropic polymer film for color compensation is provided between a polarizing plate and a liquid crystal cell of a super twisted nematic (STN) type liquid crystal display device as a liquid crystal display device capable of monochrome display with a large capacity in a simple matrix. There is a liquid crystal display device provided with the same (hereinafter referred to as an FTN type liquid crystal display device). The structure of such an FTN-type liquid crystal display device is described in Japanese Patent Publication No. 3-50249, column 6, line 41 to column 7, line 5, and FIG.
It is described in.

[0003] In recent years, many small portable information terminal devices have been required to have low power consumption, so that liquid crystal display elements have been used in many cases. Is used. Also,
In order to reduce the size of the apparatus by omitting a keyboard and to input characters and figures by hand, liquid crystal display elements with an input function having a structure in which a touch panel is arranged above the liquid crystal display element are increasing.

FIG. 8 shows a configuration of a liquid crystal display device having an input function using an FTN type liquid crystal display device. Liquid crystal cell 1
05 is an upper substrate 106 on which an upper electrode 107a is formed.
a and the lower substrate 106b on which the lower electrode 107b is formed are opposed to each other via a spacer 108, and a liquid crystal 109 is filled. An upper polarizing plate 111 is provided above the touch panel 101.
Is adhered via an adhesive layer. This liquid crystal cell 105
On the upper side of the upper substrate 106a, an optically anisotropic polymer film (hereinafter referred to as a retardation plate) 110 is adhered via an adhesive layer. Also, the lower substrate 106 of the liquid crystal cell 105
A lower polarizing plate 112 and a reflecting plate 113 are attached to the lower side of b through an adhesive layer. The phase difference plate 11 attached to the touch panel 101 and the upper substrate 106a of the liquid crystal cell 105
0 is kept at such an interval that Newton rings do not occur.

As shown in FIG. 7, the touch panel at this time has a transparent electrode 21 made of ITO or the like selectively provided on the lower surface of a transparent substrate 20 such as a polyether sulfone film, and a silver paste or the like on both ends thereof. An electrode substrate on which electrode terminals 22 composed of an electrode and routing electrodes 23 and 24 and external connection terminals 25 are formed, and a transparent substrate 26 such as a glass plate
A transparent electrode 27 made of ITO or the like and an electrode substrate having electrode terminals 28 made of silver paste or the like formed on both ends of the electrode substrate are disposed between the electrode terminals 22 of the upper substrate and the electrode terminals 28 of the lower substrate. A resistive film type is used in which the directions are orthogonal to each other and bonded with a double-sided tape 29 or the like. In addition, the electrode terminals 28 on the lower substrate and the routing electrodes 24 on the upper substrate are electrically connected at several places by a conductive material such as silver paste. As shown in FIG. 3, the cross section in the CC ′ direction of the electrical connection portion between the electrode terminal 28 of the lower substrate and the routing electrode 24 of the upper substrate shown in FIG. The substrate 20 and the substrate 26 are adhered and fixed at the paste 30 portion.

[0006]

However, a liquid crystal display device with an input function used in a measuring instrument or a portable device is used in a high-temperature and high-humidity environment. In the element touch panel, when the polarizing plate attached to the upper side of the substrate or the touch panel expands or contracts due to a change in ambient temperature or humidity, it is fixed to the substrate 26 by a silver paste 30 as shown in FIG. A phase difference occurs in the substrate 20 around the portion around the portion.
Since the touch panel is sandwiched between polarizing plates, when a phase difference is generated in this portion, the liquid crystal display appears as color unevenness colored differently from the surroundings, and has a problem that appearance is significantly reduced. Accordingly, the present invention is to solve such a conventional problem, and an object of the present invention is to provide a liquid crystal display device with an input function that does not cause color unevenness in a display unit with respect to a change in temperature or humidity. It is another object of the present invention to provide an electronic device which has a liquid crystal display element with an input function and which solves the problem that color unevenness occurs in a display portion due to a change in temperature or humidity.

[0007]

According to a first aspect of the present invention, there is provided a liquid crystal display device having an input function, comprising a pair of substrates having input electrodes on opposing inner surfaces, and a routing electrode formed between the pair of substrates. And a liquid crystal cell having a liquid crystal sandwiched between a pair of substrates having display electrodes on opposing inner surfaces, and a liquid crystal display device with an input function having a pair of polarizing plates. A plurality of openings are provided in the substrate in which the routing electrodes are formed, and a gap is formed between the one substrate and the opening in the substrate in which the routing electrodes are formed.

According to the above configuration, there is an effect that color unevenness does not occur on the display unit due to a change in temperature or humidity.

According to a second aspect of the present invention, at least one of the pair of substrates having the input electrodes is made of polycarbonate, polysulfone, polyethersulfone, polystyrene, polyvinyl alcohol, or polyarylate. It is characterized by the following.

According to the above configuration, there is an effect that a liquid crystal element having a uniform display without display unevenness can be obtained.

According to a third aspect of the invention, there is provided a liquid crystal display device having an input function, wherein at least one polymer film having optical anisotropy is provided on one of the substrates of the liquid crystal cell.

According to the above configuration, there is an effect that a liquid crystal element of black and white display can be obtained by the polymer film.

A liquid crystal display device with an input function according to a fourth aspect is characterized in that a polymer film having optical anisotropy is disposed on both sides of the liquid crystal cell.

By disposing the polymer film on both sides of the liquid crystal cell, coloring caused by the liquid crystal cell can be eliminated.

According to a fifth aspect of the invention, there is provided a liquid crystal display device having an input function, wherein the polymer film is a liquid crystal polymer film having a twisted orientation.

According to the above configuration, there is an effect that a black-and-white display liquid crystal element can be obtained by the optically anisotropic polymer film.

According to a sixth aspect of the present invention, in the liquid crystal display device with an input function, a switching element is formed on one of the substrates of the liquid crystal cell, and a scanning line and a data line are connected to the switching element. It is characterized by.

According to a seventh aspect of the present invention, in the liquid crystal display device with an input function, the surface of the polarizing plate attached to the input device is subjected to a non-glare treatment or an anti-reflection treatment.

According to the above configuration, there is an effect that the reflection of light on the surface of the polarizing plate is controlled to prevent a deterioration in display quality due to the reflected light.

The liquid crystal display device with an input function according to the present invention is characterized in that a reflection plate or a semi-transmission reflection plate is provided outside the pair of polarizing plates.

According to the above configuration, since a backlight for a light source is not used, there is an effect that a liquid crystal element with low power consumption can be obtained.

An electronic device according to a ninth aspect is the electronic device according to the first to seventh aspects.
A liquid crystal display device with an input function according to any one of the preceding claims is mounted as a display device.

According to the above configuration, there is an effect that an electronic device in which color unevenness does not occur on the display unit due to a change in temperature or humidity can be obtained.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. First, a touch panel used for the liquid crystal display device with an input function of the present invention will be described with reference to FIGS. FIG. 4 is a partial structural view of the touch panel,
Routing electrode 1 for making an electrical connection with the electrode terminal of the upper substrate
On the upper side of the routing electrode 14 electrically connecting the electrode 3 and the electrode terminal of the lower substrate, a routing having an opening at a portion corresponding to the electrical connection between the routing electrode 13 and the electrode terminal of the upper substrate. There is an insulating support 12 for the electrodes, and on the upper side, an electrical connection between the routing electrode 13 and the electrode terminal of the upper substrate and an electrical connection between the routing electrode 14 and the electrode terminal of the lower substrate. There is an adhesive layer 11 having an opening at a corresponding portion.

FIG. 5 is also a partial structural view of the touch panel. Below the routing electrode 13 and the routing electrode 14, an electrical connection between the routing electrode 14 and the electrode terminal of the lower substrate is provided. There is an insulating support 15 of a routing electrode having an opening at a portion corresponding to the above, and further below it, an electrical connection between the routing electrode 13 and the electrode terminal of the upper substrate, the routing electrode 14 and the lower electrode. There is an adhesive layer 16 having an opening at a portion corresponding to an electrical connection with an electrode terminal of the side substrate.

FIG. 6 is a structural view of the touch panel. A transparent electrode 3 made of ITO or the like is selectively provided on the lower surface of the upper substrate 1, and electrode terminals 2 made of silver paste or the like are formed on both ends thereof. A transparent electrode 6 made of ITO or the like is selectively provided on the upper surface of the side substrate 4, and electrode terminals 5 made of silver paste or the like are formed at both ends thereof. The substrates are arranged such that the direction between the electrode terminals 2 on the upper substrate (the direction in which the electrode terminals 2 face each other) and the direction between the electrode terminals 5 on the lower substrate (the direction in which the electrode terminals 5 face each other) are substantially orthogonal. And a routing electrode body 7 (or a substrate on which the routing electrodes are formed) in which the members shown in FIGS. 4 and 5 are stacked is sandwiched therebetween, and is adhered to the upper and lower substrates. On the upper surface of the routing electrode body 7, there is no adhesive layer and the portion 9 where the routing electrode appears and the portion 10 where the insulating support appears.
And external connection terminals 8. Similarly, the lower surface has a portion where the routing electrode appears and a portion where the insulating support body appears.

FIG. 1 shows a cross section of the portion AA ′ without the adhesive layer after attachment, and FIG. 2 shows a portion BB ′ without the adhesive layer. In FIG. 1, the insulating supports 12 and 15 of the routing electrode on which the routing electrode 14 is formed, the upper substrate 1 and the lower substrate 4 are fixed by the adhesive layers 11 and 16, and the routing electrode 14 and the lower substrate are fixed. Are fixed at the same time as the electrical connection is made by the conductive material 17. However, at this time, there is no adhesive layer between the upper substrate 1 and the insulating support 12 on the opposite side of the electrical connection portion and there is a gap, so the electrical connection portion and the upper substrate 1 are not fixed. .

In FIG. 2, the insulating supports 12, 15 of the routing electrodes on which the routing electrodes 13 are formed, the upper substrate 1, and the lower substrate 4 are fixed by the adhesive layers 11, 16. 13 and the electrode terminals 2 of the upper substrate are fixed at the same time as they are electrically connected by the conductive material 18. At this time, there is no adhesive layer between the lower substrate 4 and the support 15 on the opposite side of the electrical connection portion and there is a gap, so the electrical connection portion and the lower substrate 4 are not fixed.

Therefore, since the upper substrate 1 and the lower substrate 4 are not directly fixed but are fixed via the adhesive layer, even if a force for expanding or contracting is applied to the substrate, a partial phase difference is caused. Does not occur.

[Embodiment 1] As shown in FIGS. 4, 5 and 6, the touch panel according to the present embodiment is formed of a film of polyether sulfone having a thickness of 100 μm on the lower surface of an upper substrate 1 made of ITO.
Transparent electrode 3 is selectively provided, electrode terminals 2 of silver paste are formed at both ends thereof, and a transparent electrode 6 of ITO is selectively provided on the upper surface of a lower substrate 4 of 0.7 mm thick glass. A dot spacer made of resin is provided thereon to prevent contact with the transparent electrode 3 except at the time of input, and electrode terminals 5 made of silver paste are formed at both ends of the transparent electrode 6. Then, routing electrodes 13 and 14 made of copper foil are sandwiched between insulating supports 12 and 15 made of polyethylene terephthalate, adhered to substrates 1 and 4 via adhesive layers 11 and 16, and vertically extended with the routing electrodes. Electrical connection is made between the electrode terminals of the substrate by silver paste. As shown in FIGS. 1 and 2, the adhesive layers 11 and 16 have openings around the electrical connection portion made of silver paste, and are provided on the opposite side of the substrate electrically connected to the lead electrodes by silver paste. The adhesive layer of the substrate also has a wider opening than the portion that overlaps the silver paste when viewed from above.

Using this touch panel, a liquid crystal display device with an input function shown in FIG. 8 was manufactured. Touch panel 101
A non-glare polarizing plate NPF-G1225DUAG30 manufactured by Nitto Denko is adhered as an upper polarizing plate 111 on the top. The liquid crystal cell 105 is subjected to an orientation treatment so that the twist angle of liquid crystal molecules is 240 degrees inside the substrates 106a and 106b above and below the liquid crystal cell 105 made of glass having a thickness of 0.7 mm, and the refractive index anisotropy Δn is reduced. The liquid crystal layer was filled with nematic liquid crystal 109 to which an appropriate amount of an optically active agent was added so that the twist angle of liquid crystal molecules was stabilized at 240 at 0.132, and the layer thickness of the liquid crystal layer was 6.3 μm. Then, the retardation plate 110 made of a uniaxially stretched polycarbonate film having a thickness of 100 μm and a retardation of 600 nm is placed on the upper substrate 106 of the liquid crystal cell 105.
a was attached via an adhesive layer. Nitto Denko polarizing plate NPF-G3225M as lower polarizing plate 112 and reflector 113
Was adhered to the lower substrate 106b of the liquid crystal cell 105. A width of 3 m is provided between the touch panel 101 and the liquid crystal cell 105.
A silicone rubber having a height of 0.5 mm and an appropriate length was placed as a spacer.

FIG. 10 shows the orientation of liquid crystal molecules, the direction of the slow axis of the retardation plate, and the direction of the polarization axis of the polarizing plate when the liquid crystal display device with an input function of the present invention is viewed from above. Indicates the direction. α is the angle of the direction 310 of the slow axis of the retardation plate with respect to the orientation direction 306b of the liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell, and β is the orientation direction 306b of the liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell. Is the angle of the polarization axis direction 311 of the upper polarizer with respect to γ, γ is the angle of the polarization axis direction 312 of the lower polarizer with respect to the orientation direction 306b of the liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell, and θ is the upper substrate of the liquid crystal cell. Orientation direction 306a of liquid crystal molecules in contact with the inner surface of the liquid crystal cell and orientation direction 306b of liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell
This is the twist angle of the liquid crystal that is twisted between. The directions of α, β, γ, and θ are positive in the direction shown in FIG. 10 (counterclockwise direction).

Here, α is 20 degrees, β is 170 degrees, and γ is 5
When the angle is set to 0 degree, the liquid crystal display device has a black-and-white display input function that is bright when no voltage is applied and dark when voltage is applied. This liquid crystal display device with an input function has a temperature of 50 ° C. and a humidity of 90% RH.
Even after 100 hours under the environment of high temperature and high humidity, no phase difference was generated on the substrate of the touch panel, and the liquid crystal display did not have color unevenness colored differently from the surroundings.

When the opening provided in the adhesive layer of the substrate on the opposite side of the substrate electrically connected to the routing electrode by the silver paste is smaller than a portion overlapping the silver paste, the liquid crystal display with the input function is provided. After 100 hours in a high-temperature, high-humidity environment of a temperature of 50 ° C. and a humidity of 90% RH, the phase difference was generated in the electrical connection portion of the touch panel substrate by the silver paste, and the liquid crystal display was colored differently from the surroundings. Color shading has occurred.

Example 2 Using the touch panel of Example 1, a liquid crystal display device with an input function shown in FIG. 9 was manufactured.
On the touch panel 201, a non-glare polarizing plate NPF-G1225DUAG manufactured by Nitto Denko as an upper polarizing plate 211.
30 is stuck. The liquid crystal cell 205 has a thickness of 0.7 m.
Substrates 206 above and below a liquid crystal cell 205 made of m glass
a, 206b are subjected to an alignment treatment so that the twist angle of the liquid crystal molecules is 240 degrees, and the refractive index anisotropy Δn is 0.1
At 32, the liquid crystal layer was filled with nematic liquid crystal 209 to which an appropriate amount of an optically active agent was added so that the twist angle of the liquid crystal molecules was stabilized at 240 degrees, and the layer thickness of the liquid crystal layer was 6.3 μm. And thickness 10
A retardation plate 210 made of a uniaxially stretched polycarbonate film having a retardation of 0 μm and a retardation of 600 nm
5 and a polarizing plate NPF-G3225M manufactured by Nitto Denko as a lower polarizing plate 212 and a reflecting plate 213 were bonded below the lower substrate 206b via an adhesive layer. In addition, a width of 3 mm and a height of 0.5 between the touch panel 201 and the liquid crystal cell 205.
mm of silicone rubber was set to an appropriate length and placed as a spacer.

In FIG. 10, when α is set to 100 degrees, β is set to 70 degrees, and γ is set to 130 degrees, a liquid crystal display device with a black-and-white display input function that becomes bright when no voltage is applied and dark when voltage is applied is obtained. This liquid crystal display device with an input function has a temperature of 50
Even after 100 hours in a high-temperature and high-humidity environment of 90 ° C. and a humidity of 90 ° C., no phase difference was generated on the substrate of the touch panel, and no color unevenness was generated on the liquid crystal display.

Under the other conditions, the twist angle of the liquid crystal molecules is 1
In the range of 20 ° to 360 °, the product Δn × d of the refractive index anisotropy Δn of the liquid crystal and the layer thickness d of the liquid crystal is 0.4 μm to 1.5 μm.
, The retardation of the retardation plate is in the range of 0.2 μm to 1.6 μm, and the narrow angle between the slow axis direction of the retardation plate and the orientation direction of the liquid crystal molecules adjacent to the retardation plate is 40 to 9 degrees.
In the range of 0 degree, the narrow angle formed by the slow axis direction of the retardation plate and the polarization axis direction of the polarizing plate on the same side with respect to the liquid crystal cell is in the range of 20 to 70 degrees, and on the same side with respect to the liquid crystal cell. A liquid crystal display element with a black-and-white display input function with good contrast when the narrow angle between the polarization axis direction of the polarizing plate and the alignment direction of the liquid crystal molecules on the polarizing plate side when there is no phase difference plate is in the range of 20 to 70 degrees. Is obtained. If the twist angle of the liquid crystal molecules is less than 120 degrees, the contrast is poor and the display is not colored black and white, but if it is more than 360 degrees, the display speed becomes slow and the alignment state is easily disturbed, which is not preferable. The product Δn × of the refractive index anisotropy Δn of the liquid crystal and the layer thickness d of the liquid crystal
If d is smaller than 0.4 μm, sufficient contrast cannot be obtained, and if d is larger than 1.5 μm, the display speed becomes slow and the viewing angle becomes narrow, which is not preferable. The retardation value of the retardation plate, the angle between the slow axis direction of the retardation plate and the alignment direction of the adjacent liquid crystal molecules, the slow axis direction of the retardation plate on the same side of the liquid crystal cell and the polarization of the polarizing plate When the angle between the axial direction and the angle between the polarization axis direction of the polarizer when there is no retardation plate on the same side of the liquid crystal cell and the orientation direction of the liquid crystal molecules on the polarizer side is outside the above range, the liquid crystal with input function The display element is not preferable because it does not display black and white.

[Embodiment 3] In the liquid crystal display device with an input function of Embodiment 1, instead of a single retardation plate, two retardation plates of a uniaxially stretched polycarbonate film having a retardation of 450 nm are provided on the upper substrate of the liquid crystal cell. The direction of the polarizing axis of the polarizing plate and the direction of the slow axis of the retardation plate were optimized. As a result, a liquid crystal display device with an input function having a higher contrast than that of Example 1 was obtained. In this case, no phase difference occurs on the substrate of the touch panel even after 100 hours in a high-temperature and high-humidity environment at a temperature of 50 ° C. and a humidity of 90% RH, as in Example 1. No uneven coloring occurred.

[Embodiment 4] In the liquid crystal display device with an input function of Embodiment 2, not one retardation plate but two uniaxially stretched polycarbonate film retardation films having a retardation of 450 nm is used as a lower substrate of a liquid crystal cell. The polarizing axis of the polarizing plate and the slow axis of the retardation plate were optimized by adhering between the polarizing plate and the lower polarizing plate. As a result, a liquid crystal display device with an input function having a higher contrast than that of Example 2 was obtained. Also in this case, the second embodiment
In the same manner as above, even after 100 hours in a high-temperature and high-humidity environment at a temperature of 50 ° C. and a humidity of 90% RH, no phase difference occurs on the substrate of the touch panel, and the color unevenness of the liquid crystal display becomes different from the surroundings. Did not.

When two phase difference plates are used in this way, the narrow angle formed by the slow axes of the two phase difference plates is from 20 degrees to 70 degrees in addition to the range of each condition shown in the second embodiment. 1 when the range is
Thus, a liquid crystal display device with an input function of black-and-white display having better contrast than when using two retardation plates is obtained. When the narrow angle formed by the slow axes of the two phase difference plates is smaller than 20 degrees or larger than 70 degrees, there is no difference in contrast as compared with the case where one phase difference plate is used.

Example 5 In the liquid crystal display device with an input function of Example 2, the uniaxially stretched polycarbonate film having a retardation of 450 nm used in Example 2 was used.
An input function with better contrast than in the second embodiment by adhering two retardation plates one by one to the outside of the upper and lower substrates of the liquid crystal cell, and optimizing the polarization axis of the polarizing plate and the optical axis of the retardation plate. It became a liquid crystal display element. Also in this case, the second embodiment
In the same manner as above, even after 100 hours in a high-temperature and high-humidity environment at a temperature of 50 ° C. and a humidity of 90% RH, no phase difference occurs on the substrate of the touch panel, and the color unevenness of the liquid crystal display becomes different from the surroundings. Did not.

Example 6 In the liquid crystal display device with an input function of Example 1, a twisted-oriented acrylic liquid crystalline polymer film was used for the retardation plate 110 instead of a uniaxially stretched polycarbonate film. The product Δn · d of the refractive index anisotropy Δn of the liquid crystalline polymer and the thickness d of the liquid crystalline polymer layer is set to 0.1.
When the twist angle of the liquid crystalline polymer was set to 72 μm, the twist angle of the liquid crystalline polymer was set to 150 °, and the twist direction was set to the opposite direction to the liquid crystal of the liquid crystal cell, the example was implemented by optimizing the polarization axis of the polarizing plate and the optical axis of the retardation plate. This resulted in a liquid crystal display device with an input function having a better contrast than that of 1. In this case, no phase difference occurs on the substrate of the touch panel even after 100 hours in a high-temperature and high-humidity environment at a temperature of 50 ° C. and a humidity of 90% RH, as in Example 1. No uneven coloring occurred.

Example 7 In the structure of the liquid crystal display device with an input function shown in FIG. 8, the touch panel of Example 1 was used as the touch panel 101, and a non-glare polarizing plate NPF-G1225DUAG30 manufactured by Nitto Denko was adhered thereon. The liquid crystal cell 105 is subjected to an alignment treatment so that the twist angle of the liquid crystal molecules is 90 degrees inside the substrates 106a and 106b above and below the liquid crystal cell 105 made of glass having a thickness of 0.7 mm, and the refractive index anisotropy Δn is reduced. A nematic liquid crystal 109 to which an appropriate amount of an optically active agent is added is filled so that the twist angle of the liquid crystal molecules is stabilized at 0.132, and the thickness of the liquid crystal layer is 8.1 μm.
And The liquid crystal cell 105 was formed into an active matrix type by forming non-linear switching elements on the inner surface of the upper substrate 106a corresponding to the intersections of the scanning lines and the data lines. Nitto Denko polarizing plate NP as lower polarizing plate 112 and reflector 113
FG3225M is connected to the lower substrate 106b of the liquid crystal cell 105.
Stuck to. The touch panel 101 and the liquid crystal cell 10
The silicone rubber having a width of 3 mm and a height of 0.5 mm was placed between 5 and 5 as an appropriate length and placed as a spacer. As a result, a liquid crystal display device with a black-and-white display input function having a high contrast and a high response speed of the liquid crystal was obtained. Even after 100 hours in a high-temperature and high-humidity environment at a temperature of 50 ° C. and a humidity of 90% RH, no phase difference was generated on the touch panel substrate, and the liquid crystal display was colored differently from the surroundings. No color unevenness occurred.

As described above, a liquid crystal display element that is multiplex driven in a display mode such as a twisted nematic type, a guest host type, a birefringence control type, or a ferroelectric type, and a non-linear element or a transistor switching element is formed for each pixel. When the polarizing plate is attached to the touch panel used in Example 1 to obtain a liquid crystal display device with an input function in contrast to the active matrix driven liquid crystal display device using a polarizing plate, the temperature is 50 ° C. and the humidity is 90% RH. Even after 100 hours under the environment of high temperature and high humidity, there is obtained a liquid crystal display element with an input function in which no phase difference is generated on the substrate of the touch panel and no color unevenness is generated on the liquid crystal display, which is colored differently from the surroundings.

[Eighth Embodiment] In the liquid crystal display device with an input function of the first embodiment, the routing electrode 1 shown in FIGS.
3, 14 were formed with silver paste. Also in this case, Embodiment 1
In the same manner as above, even after 100 hours in a high-temperature and high-humidity environment at a temperature of 50 ° C. and a humidity of 90% RH, no phase difference occurs on the substrate of the touch panel, and the color unevenness of the liquid crystal display becomes different from the surroundings. Did not.

Ninth Embodiment In the liquid crystal display device with an input function of the first embodiment, a transparent electrode 3 of ITO is formed on the entire lower surface of the upper substrate 1 shown in FIGS. When an ITO transparent electrode 6 is formed on the entire surface,
Since the transparent electrode is not selectively formed, the cost can be reduced. In this case, the temperature is 50 ° C. and the humidity is 90 as in the first embodiment.
Even after 100 hours in a high-temperature and high-humidity environment of% RH, no phase difference occurred on the substrate of the touch panel, and no unevenness in color different from the surroundings occurred on the liquid crystal display.

Example 10 An image is obtained by applying an anti-reflection treatment to the surface of the upper polarizing plate, the surface of which has been subjected to the non-glare treatment in Examples 1 to 9, or adhering an anti-reflection-treated film. The LCD device with the input function of the display which can reduce the reflection of the image and is easy to read was obtained.

[Embodiment 11] In Embodiments 1 to 10, NPF-F4205P3 manufactured by Nitto Denko, which is a polarizing plate with a semi-transmissive reflector, is used as the lower polarizing plate and the reflecting plate, and a backlight is further disposed below the NPF-F4205P3. Was installed. The result is a liquid crystal display device with an input function that can be used in dark environments by turning on the backlight.

[Embodiment 12] When the liquid crystal display device with an input function according to any one of Embodiments 1 to 11 is mounted as a display device of a measuring instrument, an electronic organizer or a mobile phone, the device has a good contrast and is used in a high temperature and high humidity environment. However, the electronic device does not have color unevenness that is different from the surroundings on the liquid crystal display.

In the present invention, the same effect can be obtained by using polycarbonate, polysulfone, polyvinyl alcohol, polyarylate, polystyrene, or the like in addition to polyethersulfone as the upper and lower substrates of the touch panel.

Further, in the present invention, a polyether sulfone, a polysulfone,
The same effect can be obtained by using polyvinyl alcohol, polyarylate, polystyrene, or the like.

[0052]

As described above, according to the liquid crystal display device with an input function of the present invention, the electrical connection between the routing electrode and one of the substrates of the touch panel and the other substrate of the touch panel are provided. Since a structure is provided in which a gap is provided, it is possible to prevent the occurrence of color unevenness in the liquid crystal display in a high-temperature and high-humidity environment. Further, since the electronic device of the present invention is equipped with a liquid crystal display element with an input function in which the configuration and arrangement of each member of the touch panel are devised, it can be used without trouble in a high-temperature and high-humidity environment.

[Brief description of the drawings]

FIG. 1 is a sectional view of a touch panel of a liquid crystal display device with an input function according to the present invention, taken along the line AA ′.

FIG. 2 is a cross-sectional view of the touch panel of the liquid crystal display device with an input function according to the present invention, taken along line BB ′.

FIG. 3 is a cross-sectional view of a touch panel of a conventional liquid crystal display device with an input function, taken along the line CC ′.

FIG. 4 is a structural view of a part of a touch panel of a liquid crystal display device with an input function according to the present invention.

FIG. 5 is a structural view of a part of a touch panel of a liquid crystal display device with an input function according to the present invention.

FIG. 6 is a structural diagram of a touch panel of a liquid crystal display device with an input function according to the present invention.

FIG. 7 is a structural view of a conventional touch panel of a liquid crystal display element with an input function.

FIG. 8 is a structural diagram of a liquid crystal display element with an input function.

FIG. 9 is a structural diagram of a liquid crystal display device with an input function of the present invention.

FIG. 10 is a diagram showing an orientation direction of liquid crystal molecules, a direction of a polarization axis of a polarizing plate, and the like of a liquid crystal display device with an input function according to one embodiment of the present invention.

[Explanation of symbols]

1. Upper substrate 2. Electrode terminal 3. Transparent electrode 4. Lower substrate 5. Electrode terminal 6. Transparent electrode 7. Routing electrode body 8. External connection terminal 9. 10. Routing electrode body Insulating support 11. Adhesive layer 12. Insulating support 13. Routing electrode 14. Routing electrode 15. Insulating support 16. Adhesive layer 17. Conductive material 18. Conductive material 20. Substrate 21. Transparent electrode 22. Electrode terminals 23. Routing electrode 24. Routing electrode 25. External connection terminal 26. Substrate 27. Transparent electrode 28. Electrode terminals 29. Double-sided tape 30. Silver paste 101. Touch panel 105. Liquid crystal cell 106a. Upper substrate 106b. Lower substrate 107a. Upper electrode 107b. Lower electrode 108. Spacer 109. Liquid crystal 110. Optically anisotropic polymer film (retardation plate) 111. Upper polarizer 112. Lower polarizing plate 113. Reflector 201. Touch panel 205. Liquid crystal cell 206a. Upper substrate 206b. Lower substrate 207a. Upper electrode 207b. Lower electrode 208. Spacer 209. Liquid crystal 210. Phase difference plate 211. Upper polarizer 212. Lower polarizing plate 213. Reflector 306a. Alignment direction of liquid crystal molecules in contact with inner surface of upper substrate 306b. 310. Orientation direction of liquid crystal molecules in contact with inner surface of lower substrate Direction of slow axis of retarder 311. Direction of polarization axis of upper polarizer 312. Direction of polarization axis of lower polarizing plate α. Angle in the slow axis direction of the retarder relative to the alignment direction of liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell β. Angle of the polarization axis direction of the upper polarizer with respect to the alignment direction of the liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell γ. Angle of the polarization axis direction of the lower polarizer with respect to the orientation direction of the liquid crystal molecules in contact with the inner surface of the lower substrate of the liquid crystal cell θ. The twist angle of the liquid crystal that is twisted between the upper substrate of the liquid crystal cell and the lower substrate of the liquid crystal cell

Claims (9)

[Claims] 1. A touch panel comprising a pair of substrates having input electrodes on opposing inner surfaces, and a substrate on which a routing electrode is formed is disposed between the pair of substrates. In a liquid crystal cell in which liquid crystal is sandwiched between a pair of substrates having electrodes, and a liquid crystal display device with an input function having a pair of polarizing plates, a plurality of openings are provided in the substrate on which the routing electrodes are formed, A liquid crystal display device with an input function, wherein a gap is formed between the one substrate and an opening provided in the substrate on which the routing electrodes are formed. 2. The apparatus according to claim 1, wherein at least one of said pair of substrates having said input electrodes is made of polycarbonate, polysulfone, polyethersulfone, polystyrene, polyvinyl alcohol or polyarylate. Liquid crystal display with input function. 3. The input device according to claim 1, wherein at least one polymer film having optical anisotropy is provided on one of the substrates of the liquid crystal cell. Liquid crystal display with function. 4. The liquid crystal display device with an input function according to claim 1, wherein a polymer film having optical anisotropy is disposed on both sides of the liquid crystal cell. 5. The polymer film according to claim 1, wherein said polymer film is a twisted-aligned liquid crystalline polymer film.
The liquid crystal display device with an input function according to claim 1. 6. The input function according to claim 1, wherein a switching element is formed on one of the substrates of the liquid crystal cell, and a scanning line and a data line are formed in connection with the switching element. With liquid crystal display element. 7. The liquid crystal display with an input function according to claim 1, wherein a surface of said polarizing plate attached to said input device has been subjected to a non-glare treatment or an anti-reflection treatment. element. 8. The liquid crystal display device with an input function according to claim 1, further comprising a reflector or a semi-transmissive reflector outside said pair of polarizing plates. 9. An electronic device comprising the liquid crystal display device with an input function according to claim 1 as a display device.