KR100868287B1 - Display apparatus, electronic device equipped with display apparatus, and manufacturing method thereof - Google Patents

Abstract

The display apparatus includes a display panel for displaying an image, a cover panel disposed to face the display panel with an air layer therebetween, and an electrical opening disposed on the surface of any one of the display panel and the cover panel facing the air layer. A conductive material.

Display device, static electricity, reverse piezoelectric effect, antistatic film

Description

Display apparatus, electronic device equipped with a display device and a method for manufacturing the same

1 is a side view schematically showing the structure of a liquid crystal display device with a touch panel according to a first embodiment of the present invention.

2 is a side view showing a schematic arrangement of a processing apparatus used to manufacture a liquid crystal display device equipped with a touch panel according to the present invention.

3 is a graph showing the relationship between the number of connections and the amount of charge between the liquid crystal panel and the touch panel.

4 is a graph showing the relationship between the number of contacts and the sound level between the liquid crystal panel and the touch panel.

5 is a side view schematically illustrating a structure of a liquid crystal display device having a touch panel according to a second embodiment of the present invention.

6 is a side view schematically showing a modification of Embodiment 2 of the present invention.

7 is a side view schematically showing the structure of a liquid crystal display device with a touch panel according to a third embodiment of the present invention.

8 is a side view schematically showing the structure of a liquid crystal display device related to the present invention.

9 is a side view schematically showing a condition under which a common electrode signal is applied to a liquid crystal display device related to the present invention.

10 is a side view schematically showing a condition in which sound is generated by a liquid crystal display device related to the present technical concept.

11 is a graph showing the relationship between the number of contacts and the amount of charge between the liquid crystal panel and the touch panel related to the present technical concept.

12 is a graph showing the relationship between the number of contacts and the sound level of the liquid crystal display device related to the present technical concept.

* Description of the symbols for the main parts of the drawings *

10A: liquid crystal panel 20A: touch panel

21: upper substrate 22: lower substrate

13, 14: polarizing film 12: color filter substrate

15: liquid crystal 30: chassis frame

40: air layer 100: liquid crystal display device

The present invention relates to a display apparatus, an electronic apparatus having a display apparatus, and a method of manufacturing the same. In particular, the present invention relates to a display device having a cover panel, an electronic device having a display device, and a manufacturing method thereof.

In most display apparatuses for displaying an image, the display surface side of the display panel is covered with a cover panel to protect it from foreign substances or water and to enhance optical characteristics and the like. In a display apparatus, there is a touch panel type display apparatus having a cover panel having a function of detecting a pressed position. Display devices having such touch panels have been popularized in the form of personal digital assistants (PDAs) and so-called "smartphones", that is, multifunctional mobile phones. The main use of the above-described display apparatus provided with a touch panel is for inputting / outputting data, viewing an e-mail or a website, and the like. But of course these PDAs and smartphones must be made compact and lightweight. In addition, when such a PDA or smartphone has a telephone function, it is desirable that there is no noise during the telephone call.

For example, FIG. 8 shows a structural example of a liquid crystal display device equipped with a conventional touch panel related to the technology of the present invention. As shown in FIG. 8, the liquid crystal display device 210 according to the related art includes a liquid crystal panel 110, a touch panel 120, and a chassis frame 130. The liquid crystal panel 110 includes a TFT substrate 111, a color filter substrate 112, and polarizing films 113 and 114. The touch panel 120 is disposed on the display surface side of the liquid crystal panel 110 to face the liquid crystal panel 110 with the air layer 140 therebetween. The touch panel 120 includes an upper substrate 121 and a lower substrate 122. The transparent conductive film 123A serving as the position sensing electrode is formed on the surface of the upper substrate 121. Similarly, another transparent conductive film 123B serving as a position sensing electrode is formed on the surface of the lower substrate 122. Next, the upper substrate 121 and the lower substrate 122 are disposed in such a manner that the transparent conductive films 123A and 123B are positioned to face each other. The chassis frame 130 supports both the liquid crystal panel 110 and the touch panel 120 by leaving a space of the air layer 140. It should be noted that these panels are secured to the chassis frame 130 using double-sided adhesive compounds 125, 131, 132. It should also be noted that the touch panel 120 also functions as a cover panel.

In this liquid crystal display device 210 in which the touch panel 120 is mounted, as shown in FIG. 9, a common electrode signal is applied to the liquid crystal panel 110 to drive the liquid crystal panel 110. However, due to the reverse piezoelectric effect due to static electricity, very small vibration is generated in the liquid crystal panel 110 as a secondary effect. The generated vibration is transmitted through the air layer 140, and also causes the touch panel 120 disposed on the air layer 140 to be minute but vibrate.

Under this condition, when an input operation and pressure are applied to the touch panel 120, the touch panel 120 comes into contact with the liquid crystal panel 110 in the air layer 140, and then the touch panel 120 is moved from the liquid crystal panel 110. Falls. Then, static electricity is generated at the contact / peel portions, and as shown in FIG. 10, a charge is generated. However, since the surface of the liquid crystal panel 110 and the surface of the touch panel 120 on the air layer 140 are formed of an insulator, charges are not discharged and these surfaces are left in a state where charges are accumulated. As a result, an electrostatic force corresponding to the direction of the electric field generated by the common electrode signal is generated in the air layer 140. As a result, vibration is generated in synchronization with the amplitude of the common electrode signal. Similarly, the vibrations are further superimposed on the very small vibrations generated by the aforementioned reverse piezoelectric effect and the influence of the common electrode signal, thereby amplifying the vibrations.

11 is a graph showing the relationship between the number of contacts and the amount of charge for the liquid crystal panel 110 and the touch panel 120. As can be seen from this graph, the amount of charge depends on the number of contacts. In addition, there is a difference in the amount of charge between the stylus pen with a sharp tip and the finger with a relatively flat tip. As is evident from this fact, the amount of charge also depends on the contact area. The generation of vibration by charge depends on the frequency of the common electrode signal. When this frequency is present in the audio frequency range, the vibration generated by this frequency can be heard as sound or noise. As a result of the experiment conducted by the inventor of the present invention, when the sound level was measured using the sound level meter, the inventor found that the measured value within the 10 kHz range of the measuring device is corrected to the audio level. It has also been found that while various kinds of noise are generated from the liquid crystal display device, the sound is recognized by bringing the human ear closer to the display device when the sound level is approximately 15 dB or more.

12 is a graph showing the relationship between the charge level and the sound level of the liquid crystal display device measured by the above-described measuring method. As can be seen from this graph, the amount of charge and the sound level are approximately directly proportional. Therefore, it can be seen that the louder the charge, the higher the sound level.

Therefore, in order to prevent the occurrence of such a sound, it is required that the charge amount is not increased to a sound level at which no static charge itself is generated or vibration due to the charge amount can be heard. For this purpose, the following method is recognized. That is, even when the liquid crystal panel 110 and the touch panel 120 are under pressure such as an input operation, the thickness of the air layer 140 is increased so that the liquid crystal panel 110 and the touch panel 120 do not easily contact each other. . However, the thickness of the air layer 140 must be thick enough to be suppressed at a sound level at which the amount of charge cannot be heard. As a result, there is a problem that the overall thickness of the liquid crystal display device 210 is increased.

Meanwhile, other methods may be considered. That is, even when the liquid crystal panel 110 and the touch panel 120 are subjected to the above-mentioned pressure, the structural elements of the liquid crystal display device 210 have a rigid shape so that the touch panel 120 does not come into contact with the liquid crystal panel 110. Is made. In this case, however, the thickness of the structural element must be thick. As a result, similarly to the case described above, there is a problem in that the overall thickness of the liquid crystal display device 210 is increased.

As another proposed idea, there is, for example, a related technical document (Japanese Patent Laid-Open No. 2002-341372, 3 to 5, Fig. 1) of a liquid crystal display device. In this liquid crystal device, a transparent conductive film is provided on the display surface side of the liquid crystal panel, and the grounding means electrically connects the transparent conductive film to the ground. As a result, the liquid crystal panel can be electromagnetically shielded. The touch panel is disposed on the outer surface of this transparent conductive film.

However, in this structure, since the transparent conductive film is electrically connected to the ground, a potential difference is generated between the touch panel and the liquid crystal panel. As a result, vibration generated between the liquid crystal panel and the touch panel may be amplified. In fact, when the experiment was conducted with a liquid crystal display device having such a structure, the effect of sound suppression was not observed, but rather the sound was increased. As described above, even if such a structure can prevent electromagnetic waves input / output through the display screen, there is a problem that sound cannot be suppressed.

In view of the above and other typical problems, drawbacks and disadvantages of the prior art methods and structures, a representative feature of the present invention is to suppress the amount of charges generated by repeated contact and separation of the display panel and the touch panel. The present invention provides a display device, an electronic device having a display device, and a method of manufacturing the same.

The display device according to the present invention comprises a display panel for displaying an image, a cover panel disposed to face the display panel with an air layer therebetween, and a surface of any one of an electrically open, display panel and a cover panel facing the air layer. It includes an electrically conductive material disposed in.

A method for manufacturing a display device according to the present invention comprising a display panel for displaying an image, the method comprising the steps of forming a nonionic surfactant in the form of a mist, wherein the nonionic surfactant is formed on the surface of the display panel. And to form an electrically open electrically conductive material on the surface of the display panel.

Representative aspects, features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings.

The embodiments described below are only shown as illustrative examples for understanding the present invention, and the claims of the present invention are not limited to such embodiments.

Accordingly, with reference to the drawings, a detailed description will be made of a liquid crystal display device having a touch panel and a method of manufacturing the same according to Embodiment 1 of the present invention.

1 is a side view schematically showing the structure of a liquid crystal display device having a touch panel according to a first embodiment of the present invention. 2 is a side view showing a schematic arrangement of a processing apparatus used to manufacture a liquid crystal display device having a touch panel according to the present invention. 3 is a graph showing the relationship between the number of contacts and the amount of charge between the liquid crystal panel and the touch panel. 4 is a graph showing the relationship between the number of contacts and the sound level between the liquid crystal panel and the touch panel.

As shown in FIG. 1, the liquid crystal display device 100 of Embodiment 1 includes a liquid crystal panel 10A, a touch panel 20A, and a chassis frame 30 supporting the liquid crystal panel 10A and the touch panel 20A. It is provided.

The liquid crystal panel 10A is assembled by an active matrix substrate (so-called thin film transistor substrate, hereinafter referred to as TFT substrate) 11 and a color filter substrate 12 sandwiching the liquid crystal layer 15. In addition, the polarizing film 14 is mounted on the TFT substrate 11 and the polarizing film 13 is mounted on the color filter substrate 12. It should be understood that a switching element (not shown) such as a TFT (thin film transistor) for driving the liquid crystal is disposed on the TFT substrate 11. Further, an electrode layer (not shown) positioned opposite to the TFT substrate 11 is formed on this color filter substrate 12.

For example, in the touch panel 20A, it is used for a protective film system. In this touch panel 20A, the upper substrate 21 and the lower substrate 22 are disposed in such a manner that they are located opposite to each other with respect to the air layer 24 sandwiched therebetween. The transparent conductive film 23A serving as the position sensing electrode is formed on the surface of the upper substrate 21. Similarly, another transparent conductive film 23B serving as a position sensing electrode is formed on the surface of the lower substrate 22. Next, the upper substrate 21 and the lower substrate 22 are disposed in such a manner that the transparent conductive films 23A and 23B are positioned to face each other. The upper substrate 21 and the lower substrate 22 are held with a predetermined gap held between these substrates 21 and 22 by the double-sided adhesion compound 25 provided on the peripheral portion. The double-sided adhesion compound 25 also functions as a spacer.

The chassis frame 30 has a spacer function, and ends for determining a fixed position with respect to the liquid crystal panel 10A and the touch panel 20A are provided on the chassis frame 30. Thus, the air layer 40 is formed between the liquid crystal panel 10A and the touch panel 20A. The liquid crystal panel 10A and the touch panel 20A are respectively fixed to predetermined positions of the chassis frame 30 by the double-sided adhesive compounds 31 and 32.

The air layers 40 are easily separated from each other because of the weight (for example, 300 to 500 gf (gram-force)) on the touch panel 20A by an input operation performed by a camber or an input pen or a finger of the touch panel 20A. It is made to have dimensions that cannot be contacted. The thickness of the air layer 40 is 0.15 mm-0.3 mm, for example.

However, when the camber or the input weight of the touch panel 20A is increased, the lower substrate 22 of the touch panel 20A comes into contact with the upper polarizing film 13 of the liquid crystal panel 10A. Next, the touch panel 20A and the liquid crystal panel 10A are separated from each other by inertia. In particular, this phenomenon often occurs when the camber of the touch panel 20A is large and the input weight is heavy. At this time, the charge is charged due to the static electricity generated by the peeling effect at the contact portion of the upper polarizing film 13 surface. This effect can constitute the above-mentioned reason why the vibration is generated. Therefore, in Embodiment 1, an antistatic film 41 is formed on the surface of the upper polarizing film 13 to prevent this charging operation. The antistatic film 41 is electrically opened. In other words, the antistatic film 41 is fixed in an electrically floating state and does not electrically conduct current. The antistatic film 41 emits electric charges generated when the touch panel 20A and the liquid crystal panel 10A are separated from each other to prevent an increase in the electrostatic force.

It should be understood that the antistatic film 41 described above can provide a function that can prevent the charging operation. More preferably, the surface resistance of the antistatic film 41 is preferably about 1 × E12Ω / square or less. As a result, intensive charging operation can be prevented more effectively. In addition, the antistatic film 41 is made of a colorless and transparent film and its visible light transmittance is preferably about 95% or more. Thus, the display can be avoided from being disturbed. In addition, the thickness of the antistatic film 41 may be about 1 μm or less. For the antistatic film 41, a nonionic surfactant is used as the main component, and more specifically, a fluorine component system can be used. Surfactants have the property of filling and activating surfaces of insulating materials that can be easily filled.

Next, according to Embodiment 1, the assembling step for the liquid crystal display device 100 with the touch panel 20A mounted thereon is described. In particular, a method of forming the antistatic film 41 on the surface of the liquid crystal panel 10A will be described.

In FIG. 1, the TFT substrate 11 overlaps the color filter substrate 12 and the polarizing films 13 and 14 are mounted on the liquid crystal panel 10A into which the liquid crystal 15 is injected. Next, a driving voltage, an input signal, and the like are transmitted from the circuit, and a substrate (not shown) that can be bent is mounted by a pressure contact method or the like. In addition, a driver integrated circuit (also referred to as IC; not shown) for driving the liquid crystal panel 10A is mounted by a pressure contact method or the like. Alternatively, it should be noted that this driver IC can be assembled to the liquid crystal panel 10. In the case of a transmissive liquid crystal display device or a transflective liquid crystal display device, a backlight (not shown) is mounted. Under these conditions, the liquid crystal display device 100 is in a semi-finished state in which only the remaining touch panel 20A is not mounted.

In this state, the antistatic film 41 is formed on the surface of the liquid crystal panel 10A. For example, the treatment apparatus is prepared by making the treatment liquid in the form of mist and then filling the chamber with the treatment liquid in the form of mist. The treatment liquid may preferably be a synthetic aqueous solution by using a nonionic surfactant, and the treatment apparatus may preferably form a mist having an average diameter of 20 µm or less.

2 is a side view showing a schematic structure of a processing apparatus 50 used to manufacture a liquid crystal display device equipped with a touch panel according to the present invention. The processing device 50 is provided with a conveying means 51 which can convey the liquid crystal display device 55 in the semi-finished state described above at a constant speed. The liquid crystal display device 55 under the semi-finished state is transported at a constant speed in the chamber 52 filled with mist. In addition, the processing apparatus 53 of the processing liquid supplies the processing liquid to the mist and the discharging apparatus 54 discharges excess gas. As a result, a thin film sprayed with the processing liquid is formed on the surface of the liquid crystal display device, that is, the surface of the upper polarizing film 13 which has passed through the chamber 52. This film is made of a thin film having a thin thickness of 1 탆 or less. In addition, since the treatment liquid itself is colorless and transparent, the film uniformly sprayed in the form of mist is also colorless and transparent. The visible light transmittance of the film is maintained at 95% or more.

In particular, a fluorine-based surfactant is used as the surfactant of the treatment liquid. Preferably, the treatment apparatus 50 may spray the treatment liquid of 10 to 50ml / min in the form of a mist. In addition, it is preferable that the processing apparatus 50 can control the temperature from room temperature to 60 degreeC, and has an atmospheric circulation function. The conveying means 51 is typically known as a conveyor, and preferably the conveying speed of the conveying means 51 can be varied depending on the processing speed of 0.1 to 1.5 m / min.

As a representative example, the spray amount of the treatment liquid is set to 10 ml / min, the treatment speed of the conveying means 51 is set to 0.10 m / min, and the temperature of the chamber 52 is set to 30 deg. Under the above-described conditions, the liquid crystal display device 55 is mounted on the conveying means 51 in a semi-finished state. Next, in the semi-finished state, the liquid crystal display device 55 is transferred to the chamber 52. In addition, it should be noted that the temperature of the chamber 52 is controlled so that the processing liquid is circulated in the form of a mist and the atmosphere in the chamber 52 is set. As a result, mist is absorbed by the surface of the liquid crystal display device 55 in the semi-finished state. Therefore, particles of the treatment liquid having a size of several tens of micrometers show affinity for the treatment surface. As a result, a uniform antistatic film 41 having a thickness of about 1 탆 or less is formed. Finally, the liquid crystal display device 55 in the semi-finished state in which the antistatic film 41 is formed is moved out of the chamber 52.

Thereafter, the touch panel 20A is mounted on the liquid crystal display device 55 in a semi-finished state in which the antistatic film 41 is formed. Next, the liquid crystal display device 100 on which the touch panel 20A is mounted is completed. The touch panel 20A is fixed to the chassis frame 30 by the double-sided adhesive compound 32.

As a method for electrically opening the antistatic film 41, portions other than the surface of the upper polarizing film 13 are masked. In addition, after the mist-type surfactant is absorbed, the antistatic film 41 formed on the portion other than the surface of the upper polarizing film 13 can be removed.

The measurement results of the liquid crystal display device 100 on which the touch panel 20A is mounted are described as follows. 3 is a graph showing the relationship between the number of contacts and the amount of charge between the liquid crystal panel and the touch panel. Sample B shows a liquid crystal display device 100 having an antistatic film 41 according to Example 1, and Sample A shows a conventional liquid crystal display device without such an antistatic film. In the conventional liquid crystal display device (i.e., sample A), the amount of charge is increased proportionally to the contact means. In contrast, the liquid crystal display device 100 (ie, sample B) according to Embodiment 1 has no change in the amount of charge even when the number of contacts is increased.

4 shows the relationship between the number of contacts and the sound level between the liquid crystal panel and the touch panel. Sample B shows the liquid crystal display device 100 having the antistatic film 41 according to Example 1, and it should be noted that Sample A represents a conventional liquid crystal display device having no such antistatic film. In this conventional liquid crystal display device (i.e., sample A), the sound level is increased in direct proportion to the number of contacts. In contrast, in the liquid crystal display device 100 (ie, sample B) according to Embodiment 1, even when the number of contacts is increased, the sound level does not change at all.

The effect of the liquid crystal display device 100 equipped with the touch panel 20A according to the first embodiment will be described. As described above, the liquid crystal display device 100 on which the touch panel 20A is mounted is formed on the surface of the upper polarizing film 13 on the display surface side of the liquid crystal panel 10A in the electrically open state.

This structure gives rise to the first effect of the first embodiment which can suppress the intensive charging at the portion where the amount of charge generated by static electricity falls. This is because the liquid crystal panel 10A and the touch panel 20A are prevented from concentrating on falling portions when the liquid crystal panel 10A and the touch panel 20A are in contact with each other in the air layer 40.

The second effect of Embodiment 1 is that the generation of sound can be suppressed. This is because in the first embodiment, the concentrated charge is suppressed so that the vibration synchronized with the amplitude of the common electrode signal is not amplified.

The third effect of Embodiment 1 is achieved by the fact that the thickness of the air layer 40 can be made thin. This is because in Embodiment 1, even when the liquid crystal display panel 10A and the touch panel 20A are in contact with each other in the air layer 40 and fall, almost no concentration, vibration and sound of the charge amount can be generated.

The fourth effect of Embodiment 1 is achieved by the fact that the thickness of the touch panel 20A can be made thin. This is because, in Embodiment 1, almost no concentration of charge, vibration and sound can be produced, and the thickness of the structural element need not be made thick.

As a result of these effects, the fifth effect of Embodiment 1 is achieved by which the total thickness of the liquid crystal display device 100 can be made thin.

In addition, when the protective layer is provided, the sixth effect of the first embodiment is achieved by preventing the disadvantages such as scratches can be made on the surface layer of the antistatic film 41 in the assembly step and the test step.

Next, a liquid crystal display device 101 having a touch panel 20A according to Embodiment 2 of the present invention and a manufacturing method thereof will be described with reference to FIG. 5. FIG. 5 is a side view schematically showing the structure of a liquid crystal display device 101 having a touch panel 20A according to Embodiment 2 of the present invention.

The liquid crystal display device 101 of Embodiment 2 includes a liquid crystal panel 10B, a touch panel 20A, and a chassis frame 30 supporting the liquid crystal panel 10B and the touch panel 20A. The liquid crystal panel 10B includes a TFT substrate 11, a color filter substrate 12, a liquid crystal layer 15, polarizing films 13 and 14, and a conductive layer 42. It should be noted that the same reference numerals shown in Example 1 will be used to refer to the same or similar structural elements and the description thereof is omitted.

In Embodiment 1 described above, the liquid crystal panel 10A is fixed on the chassis frame 30, and the antistatic film 41 is formed on the surface of the upper polarizing film 13 disposed on the display surface side of the liquid crystal panel 10A. do.

On the other hand, in Embodiment 2, before the liquid crystal panel 10B is fixed to the chassis frame 30, the conductive layer 42 is formed on the surface of the upper polarizing film 13 disposed on the display surface side of the liquid crystal panel 10B. Is formed. Note that this conductive layer 42 is assembled to the liquid crystal display device 101 on which the touch panel 20A is mounted in the electrically open state. More specifically, in FIG. 5, the conductive layer 42 is formed on the uppermost surface of the upper polarizing film 13 disposed on the display surface side of the liquid crystal panel 10B by coating, vapor deposition, sputtering, printing or the like. .

It should be noted that the conductive layer 42 may simply have electrical conductivity. In addition, the conductive layer 42 is preferably made of a material and thickness capable of obtaining a sufficiently high transmittance. For example, it is preferable that the surface resistance value of the conductive layer 42 is about 1 * E <12> / square or less. As a result, concentration of the charging operation can be suppressed more effectively. In addition, the conductive layer 42 is made of a colorless and transparent layer and its visible light transmittance is preferably about 95% or more. As a result, display can be prevented from being disturbed. In addition, the thickness of the conductive layer 42 may be made approximately 1 μm or less. The conductive layer 42 may be formed by, for example, a transparent conductive film containing a metal oxide such as indium oxide or tin oxide as a main component, or a film including conductive metal particles such as aluminum and chromium. Can be done. These materials have the effect of conducting electrons (ie ions).

Also, in a subsequent assembly step or the like, if there is a possibility that a defect such as a scratch is made on the surface layer of the conductive layer 42, the protective layer 45 is formed on the surface of the conductive layer 42 as shown in FIG. Alternatively it may be provided. In the liquid crystal display device 101 'shown in FIG. 6, the liquid crystal panel 10B' further including the protective layer 45 is replaced with the liquid crystal panel 10B. Thus, the protective layer 45 protects the conductive layer 42 from defects such as scratches that degrade the conductive properties. In addition, it should be noted that the protective layer 45 may preferably be made of a material that can hardly degrade the conductive properties. As an example, an acrylic material, a teflon material, or the like may be used. Even with the protective layer 45 provided, the increased thickness can be reduced to approximately 50 mu m or less.

Instead of this configuration in which the conductive layer 42 is formed by sputtering or the like, a film having a similar function may alternatively be attached to the surface of the upper polarizing film 13. Even in this alternative case, the increase in the total thickness of the liquid crystal panel 10B can be reduced to 5% or less.

As described above, in the liquid crystal display device 101 having the touch panel 20a according to the second embodiment, the conductive layer 42 is in an electrically open state and the upper polarizing film on the display surface side of the liquid crystal panel 18 ( 13) was formed on the surface. By using this structure, similarly to the first embodiment, when the liquid crystal panel 10B and the touch panel 20A come into contact with each other in the air layer 40 and fall off, the static electricity is generated, which is generated by the static electricity in the falling part. The concentrated charge can be suppressed. Therefore, Example 2 has an effect similar to that of Example 1. Specifically, also in Embodiment 2, as a first effect, concentration of the charging operation can be suppressed. As a result of this first effect, sound generation can be suppressed as a second effect. In addition, as a result of this effect, as the third, fourth and fifth effects, the thickness of the air layer 40, the touch panel 20A and the total thickness of the liquid crystal display device 101 can be made thin. In addition, as a sixth effect, when the protective layer 45 is provided, defects such as scratches can be prevented from occurring in the surface layer of the conductive layer 42 in the assembling step, the testing step, and the like.

In addition to this effect, in the second embodiment, since the conductive layer 42 is provided in advance on the upper polarizing film 13, there is another effect that the subsequent assembling step can be simplified. In addition, the second embodiment may have other effects in the manufacturing step of the upper polarizing plate 13, the conductive layer 42 may be formed by a relatively simple method such as a coating method and a printing method.

Next, a liquid crystal display device 102 having a touch panel 20B according to Embodiment 3 of the present invention will be described with reference to FIG. 7. FIG. 7 is a side view schematically showing the structure of a liquid crystal display device 102 having a touch panel 20B according to Embodiment 3 of the present invention.

The liquid crystal display device 102 of the third embodiment includes a liquid crystal panel 10C, a touch panel 20B, and a chassis frame 30 supporting the liquid crystal panel 10C and the touch panel 20B. The liquid crystal panel 10C includes a TFT substrate 11, a color filter substrate 12, a liquid crystal layer 15, and polarizing films 13 and 14. In addition, the touch panel 20B includes an upper substrate 21, a lower substrate 22, transparent conductive films 23A and 23B, and a conductive layer 43. The same reference numerals as shown in Example 1 will be used to denote the same or similar structural elements and the description thereof is omitted.

In Examples 1 and 2 described above, the antistatic film 41 or the conductive layer 42 was formed on either side of the liquid crystal panel 10A or the liquid crystal panel 10B. On the other hand, in Example 3, the conductive layer 43 was formed in the touch panel 20B side. The conductive layer 43 is assembled to the liquid crystal display device 102 on which the touch panel 20 is mounted in an electrically open state. Specifically, in FIG. 7, the conductive layer 43 is formed on the lower surface of the lower substrate 22 of the touch panel 20B by coating, vapor deposition, sputtering, printing, or the like.

This conductive layer 43 has similar characteristics and characteristics to those of the second embodiment. The conductive layer 43 may be made of the same material as that of the second embodiment. In addition, a protective layer may alternatively be provided on the surface of the conductive layer 43 to protect the conductive layer 43 from defects such as scratches. Even if a protective layer is provided, the increase in the total thickness of the touch panel 20B can be suppressed to 5% or less.

In addition, similar to Embodiment 2, instead of the conductive layer 43, a film having a similar effect may be attached to the lower substrate 22. Instead of the conductive layer 43, an antistatic film similar to the first embodiment may alternatively be formed on the lower surface of the lower substrate 22.

As described above, in the liquid crystal display device 102 on which the touch panel 20B is mounted according to the third embodiment, the lower substrate 22 constituting the touch panel 20B with the conductive layer 43 electrically open. It is first formed on the surface of the. Using this structure, similarly to the first and second embodiments, when the liquid crystal panel 10C and the touch panel 20B come into contact with each other in the air layer 40 and fall off, the static electricity is generated and the charge generated by the static electricity. It is possible to suppress the intensive filling in the portion where the p-dropping occurs. Therefore, Example 3 has an effect similar to that of Example 1. In addition, since the conductive layer 43 is provided in advance on the lower substrate 22, the third embodiment has a similar effect to the second embodiment.

Structural embodiments of the display device according to the present invention have been described. However, the shape and arrangement and fixing structure of each structural element are not limited to those shown in these drawings, but may be appropriately changed without departing from the technical scope reflecting the features of the present invention. In addition, the driving method of the display apparatus can be appropriately changed without departing from the technical scope reflecting the features of the present invention.

In Examples 1 and 2, an antistatic film 41 or a conductive layer 42 is formed on the liquid crystal panel 10A side, whereas in Example 3, a conductive layer 43 is formed on the touch panel 20B side. However, Embodiment 1 or Embodiment 2 can be combined with Embodiment 3, so that an antistatic film or a conductive layer can be formed on both the liquid crystal panel and the touch panel. As a result, it is more powerful to concentrate on the portion where the charge falls. It can be suppressed.

In the structural examples described in Examples 1 to 3, the present application exemplifies the above-described TFT type liquid crystal display device. However, the present invention can be used for liquid crystal display devices such as super twisted nematic display devices other than TFT type display devices.

In addition, the present invention can be used for other panel type display devices other than TFT type display devices such as plasma display devices and organic electroluminescence (EL) display devices.

Alternatively, the present invention can be used not only for display devices with mounted touch panels, but also for display devices with mounted cover panels, or for various types of electronic devices with display devices. For example, the present invention can be used in a display device in which a cover panel for protecting the display unit is mounted on the display panel side of the display panel. As a result, even when the cover panel comes in contact with the display panel and falls, it is possible to prevent the charge panel from concentrating on the portion where the charge falls.

Examples of specific devices are the input / output and display devices of portable terminals, mobile terminals, and various classes of electronic devices. Specific examples of portable terminals include mobile phones, smart phones, PDAs, tablet computers, mobile computers, notebook computers, game machines, electronic dictionaries, and digital cameras. As specific examples of mobile terminals, there are a car navigation device and a car audio device. Specific examples of input / output and display devices of various classes of devices include automated teller machines (ATMs) and manufacturing devices.

Although the present invention has been described in connection with certain embodiments, it should be understood that the main problem according to the present invention is not limited to this particular embodiment. On the contrary, the main problem of the present invention is contemplated to include all changes, modifications, and equivalents that may be included within the spirit and scope of the following claims.

It is also the intention of the inventor to retain all equivalents of the claimed subject matter even if the claims are amended.

Since the above-described structure is used, the display device according to the present invention, an electronic device having a display device, and a manufacturing method thereof have the following effects. In other words, when an input operation or pressure applied to the touch panel is applied, when the touch panel comes into contact with the display panel and then falls from the display panel, it is possible to suppress charging at a portion where the charge generated by static electricity falls.

Claims (20)

A display panel for displaying an image; A cover panel disposed to face the display panel with the air layer therebetween; And A display device electrically open and including an electrically conductive material disposed on a surface of any one of a display panel and a cover panel facing an air layer. The display apparatus of claim 1, wherein the cover panel comprises a touch panel for detecting a position at which the cover panel is pressed. The display apparatus of claim 1, wherein the electrically conductive material is any one of an antistatic film and a conductive layer. The display device according to claim 1, wherein the surface resistance value of the electrically conductive material is 1 × E 12 kW / square or less. The display device of claim 1, wherein the visible light transmittance of the electrically conductive material is 95% or more. The display device of claim 1, wherein the thickness of the electrically conductive material is less than 1 micron. The display device of claim 1, wherein the electrically conductive material comprises a nonionic surfactant. The display device of claim 1, wherein the electrically conductive material comprises a metal oxide. The display apparatus of claim 8, wherein the metal oxide comprises any one of indium oxide and tin oxide. The display device of claim 1, wherein the electrically conductive material comprises a metal. The display apparatus of claim 1, further comprising a protective film on the surface of the electrically conductive material to protect the electrically conductive material. The display apparatus according to claim 1, wherein the display apparatus is a liquid crystal display apparatus. An electronic device having a display device comprising the display device according to claim 1. A method of manufacturing a display device including a display panel for displaying an image, the method comprising: Forming a nonionic surfactant in the form of a mist; Allowing the nonionic surfactant to be absorbed onto the surface of the display panel; And Forming a electrically open electrically conductive material on the surface of the display panel. 15. The method of claim 14, further comprising disposing a cover panel facing the display panel with the air layer therebetween. The method of claim 15, further comprising providing a touch panel for detecting a position pressed by the cover panel. The method of claim 14, further comprising including a fluorine-based surfactant in the nonionic surfactant. The method of claim 14, further comprising setting a surface resistance value of the electrically conductive material to 1 × E 12 Ω / square or less. 15. The method of claim 14, further comprising setting a visible light transmittance of the electrically conductive material to 95% or more. 15. The method of claim 14, further comprising setting the thickness of the electrically conductive material to 1 micron or less.

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