KR200234651Y1 - Flat panel display with touch panel - Google Patents

Abstract

The present invention relates to a touch panel integrated flat panel display.

In the touch panel integrated flat panel display of the present invention, a dot spacer formed between the top sheet of the touch panel and each transparent conductive film of the bottom sheet is arranged on the bottom sheet so that the top plate and the bottom plate are bonded, and the polarizing plate bonded to the bottom sheet is touched. The polarizing plate having an adhesive layer bonded to the lower sheet of the panel and bonded to the touch panel and another lower adhesive layer for bonding the polarizing plate integrated in the touch panel to the upper glass of the liquid crystal display device at the bottom of the lower substrate. The polarizing plate which is in contact with the lower glass of the liquid crystal display device is bonded to the lower glass of the liquid crystal display device. As a result, the lamination structure is lighter and thinner, the light transmittance loss is improved, defects caused by deformation of the active region of the touch panel are eliminated, and the lamination process is also reliable and high yield is obtained.

Description

Flat panel display with touch panel {Flat panel display with touch panel}

The present invention relates to a touch panel integrated flat panel display.

A touch panel that is integrated or added to computers, portable transfer devices, spherical or aspheric display devices, or other personal data processing devices (PDAs) is one of the input devices, but has a higher input than other input devices such as a mouse or keyboard. This simple, less misoperation and has input characteristics that can be input by hand, is known in various forms and methods.

Current touch panels are turning to micro technology such as high reliability, provision of new functions, durability, manufacturing technology related to design and processing including materials or materials, rather than general functions as input devices. The performance is known in detail.

Briefly, there is a resistive touch panel composed of two sheets of resistive components that are isolated by a spacer and arranged to be in contact with each other by pressing, and are capacitive, ultrasonic, and light (infrared). There is also a touch panel such as sensor type and electromagnetic induction type. Since the problems of signal amplification, resolution, and difficulty of design and processing technology all appear differently, the choice of method takes into account the durability and economy in addition to optical, electrical, mechanical, environmental, and input characteristics. Decide by

1 is a cross-sectional view illustrating a basic structure of the resistive touch panel 10. Structurally, the upper plate 20 placed on the upper portion and the lower plate 30 placed on the lower portion are bonded by the adhesive 40 having a thickness of about 75 to 200 μm so that the transparent conductive film 22 faces each other. The upper plate 20 is in contact with the lower plate 30 in response to the pressure pressed when input. As the base plate 20, a stretchable PET film or thin glass is used as the substrate. The purpose of using thin glass is to reduce the surface reflection by attaching a polarizer on the optically isotropic material, but recently, a plastic film having optical isotropy has also been commercialized. However, there is much room for improvement in terms of cost, difficulty in processing, and physical properties.

The input position detection is a structure in which the upper plate 20 and the lower plate 30 are sandwiched between the dot spacers 50 so as to face each other at intervals of 100 to 300 μm, and the input signal is extracted by a connector tail. In operation, when the upper plate 20 and the lower plate 30 come into contact with each other by an input point, and a voltage is applied between the electrodes of the lower plate 30, a potential gradient occurs on the resistance surface between the two electrodes, and the voltage is applied to the electrodes of the upper plate 20. Read and calculate the input position of X axis through controller. Then, a voltage is applied between the electrodes of the upper plate 20, the voltage is read from the electrode of the lower plate 30, the position of the Y axis is calculated, and the input point is displayed on the display. By repeating this at high speed, it is possible to continuously display the input position on the display and draw characters and lines.

The required characteristic of a touch panel is a characteristic requested from a user by the versatility of a touch panel mounting product. In order to meet this, it can be accommodated to some extent through some structural improvements of the touch panel, but it is difficult to accommodate them all. In addition, there is a limit to correspond only with a resistive touch panel. Here, it is necessary to select an optimal one from the configuration and detection method of the touch panel suitable for various required characteristics.

On the basis of the required characteristics, the resistive touch panel is suitable for public use where price, productivity, and handwriting are prioritized. Just as the seismic method is suitable for industrial equipment applications where durability, optical characteristics, insulation and the like are important, the characteristics are all related to the user's choice.

On the other hand, there are many cases of using LCD as a display, but there are various types of LCDs, and their use is classified according to the use of the product. Several methods are considered to classify LCDs.

For example, it is possible to classify monochrome and color, classify transmissive and reflective type, and classify into STN or TFT type from the structural surface.

In particular, the high resolution of TFTs and the improvement in color yield of reflective LCDs have increased the demand for touch panels mounted on LCDs.

In general, the length from the outermost periphery of the visible region to the outer periphery of the touch panel is called an inactive region. There is a demand for miniaturization and thinning of products and improvement of effective area ratio of screens. Due to the large reduction of the inactive area of the LCD, due to the constraints of the assembly structure not larger than the LCD outline length, it is natural that the touch panel also reduces the inactive area. However, there is a problem of deterioration of linearity of the electrode and insulation shield, and easy invasion of electromagnetic waves and static electricity, and thus a problem of noise. Complementary techniques have been proposed.

As mentioned above, the resistive touch panel is suitable for public use, but it remains a question whether it can meet the required performance and meet various demands (required characteristics) in harmony with the LCD and the like. The touch panel remains the same.

Figure 2 shows a known technique for laminating a resistive touch panel on a flat panel display according to a required characteristic as shown in FIG.

The structure of FIG. 2 places the polarizer 60 under the touch panel 10 including the upper sheet 21 and the lower sheet 23, and puts the liquid crystal display device 70 under the polarizer 60 again and the liquid crystal. The polarizer 80 is placed under the display element 70 to form a laminate of the polarizers 80.

Here, the polarizing plates 60 and 80 change the visible light into linearly polarized light on both surfaces of the liquid crystal display device 70 of the flat panel display. To this end, the polarizing plates 60 and 80 are usually made of a structure in which an appropriate film such as a transparent conductive film composed of an upper substrate 61, an optical film substrate 62, and a lower substrate 63 is laminated.

The technique of laminating the touch panel 10 to the flat panel display using the polarizing plates 60 and 80 all aims to make the light transmittance as good as possible while maintaining the optical axis, and to achieve a thin and light weight in terms of the laminated structure. Is solved in the same way as using isotropic materials, and the light transmittance is optimized for thin, small and light, and at least laminated structure is applied to improve the light transmittance on the cross-sectional structure. Consideration should be given to a range that is not disadvantageous for small size, light weight, and thinning.

Specific examples of the design are known in Korea, such as Japanese Patent Application Laid-Open No. 1998-041100 and Japanese Patent Publication No. 1996-24536. The technique was not to set aside the polarizers, but rather to integrate them into the touch panel (lower part) while acting as a polarizer. The technology provided a design that was advantageous for thin, thin, light weight, process improvement, and low cost, but the question was whether the polarizer could be reliably maintained in light transmittance, yield, and reliability.

On the other hand, the example of the other case where the base material of a polarizing plate is different and integrated or added to a touch panel, ie, a new polarizing plate or the laminated structure using the polarizing plate is known. This is shown schematically in FIGS. 3 and 4. This technique combines the general results that are associated with the selection of the substrates 60 and 80 with the gains obtained by integrating the polarizer 60 into the touch panel 10 and the results of the stacking of the touch panel 10 and the flat panel display. The structure expands the application area.

An example of a lamination structure of a polarizing plate or a touch panel and a flat panel display in the cross-sectional structure shown in FIGS. 3 and 4 is as follows.

1. Structure of polarizing plates 60 and 80 having a layered structure of an upper base 61, an optical film base 62, and a lower base 63.

2. The structure of the integrated polarizing plate 60 using a transparent conductive film replacing the isotropic film on the polarizing plate 60 laminated from the lower base 63, the optical film base 62 and the upper base 61 from below.

3. From below, the lower substrate 63, the optical film substrate 62, and the transparent conductive film-integrated polarizing plate 60 made of a transparent conductive film, the transparent conductive film and the dot spacer 50 are applied to the lower surface and the electrode 41 and Structure of a polarizing plate-integrated touch panel consisting of a touch panel 10 made of a top sheet 21 provided with a tail 42.

4. Transparent conductive film-integrated polarizing plate 60 consisting of a lower substrate 63, an optical film substrate 62, an upper substrate 61, and a transparent conductive film from below, and a dot spacer 50 is applied to the transparent conductive film and the lower surface. And a touch panel structure comprising a touch panel including an upper sheet 21 provided with an electrode 41 and a tail 42.

5. From below, a polarizing plate 80 consisting of a lower base 63, an optical film base 62 and an upper base 61, a lower glass 72, a lower glass 72 and an upper side from below on the polarizing plate 80. Liquid crystal display device 70 consisting of a liquid crystal between the glass 71 and the upper glass 71, a transparent conductive film integral type consisting of a lower base 63, an optical film base 62 and a transparent conductive film from below on the liquid crystal display Touch panel integrated flat panel display structure consisting of a touch panel consisting of a polarizing plate 60, a transparent conductive film and a top spacer 21 is coated on the bottom surface and the electrode 41 and the tail 42 is installed.

6. From below the polarizing plate 80 consisting of the lower substrate 63, the optical film substrate 62 and the upper substrate 61, the lower glass 72, the lower glass 72 light from above on the polarizing plate 80 A liquid crystal display device 70 composed of a liquid crystal between the liquid crystals and an upper glass 71, a lower base 63, an optical film base 62, an upper base 61, and a lower base 63 above the liquid crystal display 70; A transparent conductive film-integrated polarizing plate 60 made of a transparent conductive film, a transparent conductive film and a touch panel composed of a top spacer 21 coated with a dot spacer 50 on the bottom surface and having an electrode 41 and a tail 42 installed thereon. And a touch panel integrated flat panel display structure.

The structure of the transparent conductive film-integrated polarizing plate, the polarizing plate-integrated touch panel, or the touch panel-integrated flat panel display structure, like the conventional design structure, varies the lamination of the transparent conductive film in order to make the light transmittance as good as possible while maintaining the optical axis. The laminated structure aims at making it thin, small, and lightweight.

However, in order to make such a polarizing plate integrated touch panel laminated structure, the problem of how the laminated structure for completing the laminated structure of the polarizing plate integrated touch panel can be followed or blended with the process technology, rather than changing the base material and the laminated structure of the polarizing plate. Big. In practice, process technology has contributed to limiting these technical goals.

Problems and structural limitations of the laminated structure of a conventional polarizing plate and a touch panel or a flat panel display will be described with reference to the lamination process technology.

5 schematically illustrates a lamination process for adding a polarizer integrated touch panel to a flat panel display.

In order, first, a double-sided adhesive sheet 90 having an area similar to the size of the polarizing plate 60 and the touch panel 10 is prepared in advance, and one side of the double-sided adhesive sheet 90 is placed on the lower sheet of the touch panel 10. (23) (Step 1)

When one side of the double-sided adhesive sheet 90 is bonded to the lower sheet 23 of the touch panel 10, the back side of the double-sided adhesive sheet 90 is adhered to the upper base 61 of the polarizing plate 60. (Step 2 )

When this sequence is completed, the lower sheet 23 of the touch panel 10 and the upper base 61 of the polarizing plate 60 are joined by the double-sided adhesive sheet 90.

Then, by bonding the upper sheet 21 and the lower sheet 23 of the touch panel 10, the upper plate 20 and the lower plate 30 are combined to complete the touch panel 10 in which the polarizing plate 60 is integrated. Step 3)

When the polarizing plate-integrated touch panel 10 is laminated (bonded) to a flat panel display, the upper portion of the flat panel display includes a double-sided adhesive sheet 90 as used in the above procedure, at least in the upper glass of the polarizing plate 60 and the liquid crystal display device 70. (71) is placed and stacked, and in a similar manner, the double-sided adhesive sheet (90) is applied, the polarizing plate (80) is bonded to the lower glass (72), and the touch panel (10) is laminated on the flat panel display.

The atmosphere of the above-mentioned lamination process (sequence) is most of the process of transferring heat and the appropriate lamination pressure. Therefore, some lamination order may be changed, but when the double-sided adhesive sheet 90 is used, the polarizing plate 60 and the lower sheet 23 of the touch panel have priority over the upper and lower sheets 21 and 23 of the touch panel 10. ) Is adhered first, because the upper and lower sheets 21 and 23 of the touch panel 10 are bonded to the polarizing plate 60 through the double-sided adhesive sheet 90 by the pressure. This is because distortion of the touch panel, top and bottom plates, and thermal deformation are inevitable.

6 schematically illustrates a lamination process added to a flat panel display by another structure of a polarizing plate integrated touch panel, and insulates the upper and lower plates 20 and 30 of the touch panel to improve some problems in the lamination process. The dot spacer 50 is formed on the upper sheet 21 of the upper plate 20 without being placed on the lower plate 30.

Such a structure may cause the dot spacer 50 to be placed on the lower plate 30 of the touch panel 10, that is, a problem that may occur in the lamination process, that is, the dot spacer 50 is pressed in the above step 1.2 in which the polarizer 60 is pressed on the lower plate 30. It can be regarded as a structure to prepare for the possibility that the insulation does not fall in the expected active region by depressing (depressing) the pressure. However, in this structure, since the impact applied when contacting the upper plate 20 is higher than that of the lower plate 30, the dot spacer 50 is likely to be peeled off from the transparent conductive film 22.

Another problem is that when the double-sided adhesive sheet 90 is used to bond the touch panel 10 and the polarizing plate 60, two steps are required, so it is difficult to guarantee the uniformity of planar adhesion. Due to the formation of the air gap, there is a problem of lowering the transmittance and lowering the yield.

When the polarizing plate integrated touch panel is laminated and applied to a flat panel display, the optical transmittance is maintained while maintaining the optical axis, and the laminated structure is advantageous for thinness and light weight. Lamination structure is likely to lead to fatal defects such as loss of transmittance due to air gap and deformation of the active area of the touch panel in the lamination process, and the lamination process must be prepared for such a possibility, so that the yield or product reliability is high. Depending on the lamination process, it remains at a very low level.

Therefore, an object of the present invention is to make the laminated structure advantageous in thinness and light weight when the polarizing plate integrated touch panel or the flat panel display is applied as a laminated structure.

Another object of the present invention is to improve the light transmittance by reducing the air gap generated in the stack of the polarizing plate integrated touch panel.

Features of the present invention to achieve these purposes,

An upper plate and an upper plate having a transparent conductive film formed thereon, a transparent conductive film such as a transparent conductive film formed on the upper plate, and a lower plate having a lower sheet thereunder, a dot spacer insulated between the upper and lower plates, and between the upper sheet and the lower sheet. A touch panel having electrodes for applying a voltage to the resistive film,

A polarizing plate bonded to the lower sheet of the touch panel to convert visible light into linearly polarized light, a liquid crystal display device comprising an upper glass, a liquid crystal and a lower glass to which the polarizing plate is bonded, and a lower part of the liquid crystal display device In the touch panel integrated flat panel display made of another polarizing plate bonded to the glass,

The touch panel integrated flat panel display,

Dot spacers formed between the transparent conductive films of the upper sheet and the lower sheet are arranged on the lower sheet to bond the upper and lower plates,

The polarizing plate to be bonded to the lower sheet is composed of an upper substrate, an optical film substrate, and a lower substrate in order to be bonded to the lower sheet of the touch panel on the upper surface of the upper substrate, and the adhesive layer to bond the polarizing plate to the touch panel and to the bottom of the lower substrate of the polarizing plate. It consists of a polarizing plate having another adhesive layer for bonding the polarizing plate integrated in the touch panel to the upper glass of the liquid crystal display device,

The polarizing plates which come into contact with the lower glass of the liquid crystal display device are sequentially laminated with an adhesive layer, an upper substrate, an optical film substrate, and a lower substrate, and are bonded to the lower glass of the liquid crystal display device.

1 is a cross-sectional structure of a typical touch panel

2 is a schematic cross-sectional view of a laminated structure in which a touch panel is added to a flat panel display

3 is a schematic view of a conventional polarizing plate integrated touch panel.

4 is a schematic view of another conventional polarizer integrated touch panel or touch panel integrated flat panel display.

5 is a schematic diagram showing a lamination process of a conventional flat panel integrated touch panel and a touch panel integrated flat panel display.

6 is a schematic view of another conventional lamination process

7 is a diagram schematically showing a laminated structure of a polarizing plate integrated touch panel according to the present invention

8 is a diagram schematically showing a laminated structure of another polarizing plate integrated touch panel of the present invention

9 is a diagram schematically illustrating a laminated structure of a polarizer integrated touch panel or a touch panel integrated flat panel display according to the present invention;

10 is a view showing the deposition region of the polarizing plate integrated adhesive layer according to the present invention

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

100: touch panel 200: top plate

210: top sheet 220; transparent conductive film

230: bottom sheet 300: bottom plate

500: dot spacer 600: polarizing plate

610: upper substrate 620: optical film substrate

630: lower substrate 700: liquid crystal display element

800: polarizing plate 900.910.920: adhesive layer

The polarizing plate-integrated touch panel or touch panel-integrated flat panel display according to the present invention is lighter in structure, more compact, and thinner. Blocking improves the light transmittance and eliminates defects caused by deformation of the active area of the touch panel. Furthermore, the lamination process itself maintains high yield and high reliability.

Hereinafter, an embodiment of the present invention will be described.

Figure 7 schematically shows a laminated structure of a polarizing plate-integrated touch panel that can be represented by the present invention.

In the polarizing plate integrated touch panel, the touch panel 100 may include a top plate 200 having a top sheet 200 and a transparent conductive film 220 formed thereon, and a transparent conductive film 220 such as a transparent conductive film 220 of the top plate 200. And a lower spacer 300 having a lower sheet 230 thereunder, a dot spacer 500 insulating the upper plate 200 and the lower plate 300, and a resistance between the upper sheet 210 and the lower sheet 230. There is an electrode that applies a voltage to the film. The polarizing plate 600 bonded to the lower sheet 230 of the touch panel 100 to convert visible light into linearly polarized light includes an upper substrate 610, an optical film substrate 620, and a lower substrate 630. It is applied when the bottom sheet 230 of the (100) is bonded.

The polarizing plate 600 is not necessarily a laminated structure of the upper substrate 610, the optical film substrate 620, the lower substrate 630.

When the polarizing plate 600 is made up of an upper substrate 610, an optical film substrate 620, and a lower substrate 630, the polarizing plate 600 is bonded to the lower sheet 230 on the upper surface of the upper substrate 610 to touch the polarizing plate 600. It is provided with an adhesive layer 900 integrally formed with 100 to form a laminated structure. In this case, the adhesive layer 900 may be formed on the whole upper substrate 610 or partially.

8 is another laminated structure of a polarizer integrated touch panel that may appear according to the present invention.

In the integrated touch panel of the polarizing plate, the touch panel 100 may include a top plate 200 having a top sheet 210 and a transparent conductive film 220 formed thereon, and a transparent conductive film 220 such as a transparent conductive film 220 of the top plate 200. And a lower spacer 300 having a lower sheet 230 thereunder, a dot spacer 500 insulating the upper plate 200 and the lower plate 300, and a resistance between the upper sheet 210 and the lower sheet 230. There is an electrode that applies a voltage to the film. The polarizing plate 600 bonded to the lower sheet 230 of the touch panel 100 to convert visible light into linearly polarized light includes an upper substrate 610, an optical film substrate 620, and a lower substrate 630. It is applied when the bottom sheet 230 of the panel is bonded.

The polarizing plate 600 is not necessarily a laminated structure of an upper substrate, an optical film substrate, and a lower substrate.

The dot spacer 500 formed between the upper conductive sheet 220 and the transparent conductive layer 220 of the lower sheet 230 is arranged on the lower sheet 210 to stack the upper plate 200 and the lower plate 300.

When the polarizing plate 600 is formed of an upper substrate, an optical film substrate, and a lower substrate in order, the polarizing plate 600 is bonded to the lower sheet 230 of the touch panel 100 on the upper surface of the upper substrate 610 of the polarizing plate 600. Is integrated into the touch panel 100 to form an adhesive layer 900 is included in the polarizing plate 600.

The lower substrate 630 of the polarizing plate 600 includes another adhesive layer 910 for bonding the upper glass 710 of the liquid crystal display device 700 to the polarizing plate 600 integrated into the touch panel.

The adhesive layers 900 and 910 may be formed on the entire surface of the substrate or partially.

9 is a schematic view showing a laminated structure of a polarizing plate integrated touch panel or a touch panel integrated flat panel display according to the present invention.

Touch panel integrated flat panel display,

The upper sheet 210 and the upper plate 200 having the transparent conductive film 220 formed thereon, the transparent conductive film 220 such as the transparent conductive film 220 of the upper plate 200, there is a lower plate 230 below A touch panel having a dot spacer 500 insulated between the upper plate 200 and the lower plate 300, and an electrode for applying a voltage to the resistive film between the upper sheet 210 and the lower sheet 230 ( 100, a polarizing plate 600 bonded to the lower sheet 230 of the touch panel 100 to convert visible light into linearly polarized light, and an upper glass 710 and a liquid crystal 730 to which the polarizing plate 600 is bonded. In addition, the present invention is applied to a touch panel integrated flat panel display including a liquid crystal display device 700 including a lower glass 720 and another polarizing plate 800 bonded to the lower glass 720 of the liquid crystal display device 700.

Here, the dot spacer 500 formed between each of the transparent conductive films 220 of the upper sheet 210 and the lower sheet 230 is arranged on the lower sheet 230 so that the upper plate 200 and the lower plate 300 are bonded to each other. When the polarizing plate 600 bonded to the lower sheet 230 is formed of an upper substrate, an optical film substrate, and a lower substrate, the upper substrate 610 may be bonded to the lower sheet 230 of the touch panel 100. The adhesive layer 900 attaches the polarizing plate 600 to the touch panel 100, and the lower substrate 630 of the polarizing plate 600 is attached to the upper glass 710 of the liquid crystal display device 700. The polarizing plate 600 having another adhesive layer 910 for bonding the integrated polarizing plate, and the polarizing plate 800 which is brought into contact with the lower glass 720 of the liquid crystal display device 700 in turn are the adhesive layer 920 and the upper substrate. 610, an optical film substrate 620, and a lower substrate 630 are laminated to the lower glass 720 of the liquid crystal display device 700.

The polarizing plate 800 bonded to the lower glass 720 is not necessarily an upper substrate, an optical film substrate, or a lower substrate.

The adhesive layers 900, 910, and 920 may be formed on the entire substrate or partially.

The lamination structure of FIG. 7.8.9 illustrating a polarizing plate integrated touch panel and a touch panel integrated flat panel display laminated structure that may appear according to the application of the present invention is a lamination process as follows.

1. In the polarizing plate-integrated touch panel of FIG. 7, the dot spacer 500 is formed on the transparent conductive film 220 of the lower sheet 230, and the transparent conductive film 220 of the upper sheet 210 and the lower sheet 230 are separated from each other. In order to bond the touch panel to face each other, the adhesive layer 900 and the lower sheet 230 of the touch panel based on the adhesive layer 900 formed on one surface of the lower sheet 230 and the polarizing plate 600 of the touch panel 100. It is manufactured by laminating a polarizing plate integrated touch panel in the order of bonding.

2. The polarizing plate-integrated touch panel of Fig. 8 is manufactured in the order of the touch panel bonding and the bonding of the touch panel and the polarizing plate as described above.

3. In the touch panel integrated flat panel display of FIG. 9, the dot spacer 500 is formed on the transparent conductive film 220 of the lower sheet 230, and the transparent conductive film 220 of the upper sheet 210 and the lower sheet 230 is formed. Bonding the touch panel 100 so as to face each other, bonding the adhesive layer and the lower sheet 230 of the touch panel based on the adhesive layer 900 formed on one surface of the lower sheet 230 and the polarizing plate 600 of the touch panel. In this order, the lower sheet 230 is manufactured in the order of bonding with the upper glass 710 of the liquid crystal display device 700 based on the adhesive layer 910 formed on the opposite surface of the polarizing plate 600 bonded to the lower sheet 230.

In the lamination process of 1.2.3, the upper panel 200 and the lower panel 300 of the touch panel are commonly bonded first to make the touch panel as a whole, and then the lower sheet 230 and the polarizing plate 600 of the touch panel are bonded in the following order. Proceed in order. This order is the result obtained by forming the dot spacer 500 on the transparent conductive film of the lower sheet. That is, when the upper plate and the lower plate of the touch panel 100 are entirely bonded, the air cap between the upper plate and the lower plate 300 serves as a buffer that acts as a buffer against the pressure applied to the dot spacer 500. The polarization plate 600 and the touch panel 100 may be bonded to each other without deformation of the active region caused by the recess of the dot spacer 500. As such, forming the dot spacer 500 on the transparent conductive film 220 of the lower sheet 230 is not new as described above.

More importantly, when the conventional laminated structure in which the dot spacer 500 is formed on the transparent conductive film of the lower sheet 230 is structurally bonded to the polarizing plate 600, the touch of the present invention is preceded by the characteristics of the adhesive or the lamination process. The upper plate 200 and the lower plate 300 of the panel has a problem in the lamination process that can not be bonded to the first as a whole, the gain (for the case of forming a dot spacer in the lower sheet) was not obtained, whereas in the present invention The upper surface of the 600 has an adhesive layer 900 so that the upper plate and the lower plate of the touch panel are first bonded and later bonded to the polarizer 600.

In the case of attaching the first and second touch panels joined together to the polarizing plate using a normal double-sided adhesive sheet without the adhesive layer 900 on the polarizing plate 600 as in the present invention, the film quality of the transparent conductive film and the sharp deformation of the dot spacer are caused, resulting in high precision. It is difficult to expect this polarizing plate integrated touch panel manufacture.

On the other hand, the subject innovation is to make the lower plate 300 formed on the lower sheet 230, the dot spacer 500 and to attach the upper plate 200 attached thereon in any form first to form a polarizing plate integrated touch panel or touch later to the desired laminated structure It is characterized in that the panel-integrated flat panel display, and for this purpose, by forming the adhesive layers 900 and 910 on both sides of the polarizing plate 600 in advance, there is no problem such as depression of the dot spacer 500 in the laminate manufacturing. It was.

Besides this result by the adhesive layers 900 and 910 on the polarizing plate 600, the present invention has yet another result with respect to the formation of the adhesive layer.

10 is a model of the adhesive layers 900, 910, 920 placed on the polarizers 600, 800. Its shape is that the upper substrate (regardless of whether the upper substrate has any physical property, regardless of the application of the adhesive layer) of the polarizing plates 600, 800 is substantially rectangular planar adhesive layer 900, 910 ( 920 is capable of full deposition. The technique of forming an adhesive layer on a plane with respect to a plane is not difficult. 10 illustrates an example of forming an adhesive layer covering the entire area of the upper or lower substrate of the polarizers 600 and 800, but in some cases, partial deposition along only the outermost part may be sufficiently considered. However, a more stable form of adhesion is to form an adhesive layer with a uniform thickness over the entire surface. When the adhesive layer is deposited in the form of covering the entire surface of the upper or lower substrate of the polarizer as shown in FIG. 10, it is possible to cleanly remove the air gap caused by lifting or unstable bonding between the lower sheet of the touch panel and the upper adhesive surface of the polarizer.

The air gap formed between the touch panel and the bonding surface of the polarizing plate has a significant influence on the light transmittance.

Therefore, the adhesive layer on the polarizing plate firstly prevents the inactivation of the active area or the damage of the transparent conductive film quality due to the depression of the dot spacer of the touch panel during the lamination process, and secondly, the loss of the light transmittance due to the air gap between the touch panel and the polarizing plate. Can be reduced. Thus, the improvement in light transmittance is obtained through the stability of the laminate structure excluding the physical properties of the laminate substrates.

Similarly, in the case of the touch panel integrated flat panel display, the front surface of the polarizing plate can be attached even within the active region where the image data of the liquid crystal display device comes out, thereby reducing the loss of transmittance.

When the polarizing plate integrated touch panel or the flat panel display is applied as a laminated structure, the laminated structure can be sufficiently satisfied through fine deposition of an adhesive layer. It is advantageous to light weight.

As such, the present invention is thin and lightweight when the polarizing plate integrated touch panel or the flat panel display is applied in a laminated structure, and the air gap formed between the bonding surface of the touch panel and the polarizing plate can reduce light transmittance loss due to In the lamination process, the active area and film quality are prevented from being damaged due to the depression of the dot spacer of the touch panel, and in the case of the touch panel integrated flat panel display, the polarizer can be attached to the front surface even in the active area where the image data of the liquid crystal display device comes out. The loss of is effective. In the lamination process, high production yields and high reliability products can be produced.

Claims (2)

An upper plate and an upper plate having a transparent conductive film formed thereon, a transparent conductive film such as a transparent conductive film formed on the upper plate, and a lower plate having a lower sheet thereunder, a dot spacer insulated between the upper and lower plates, and between the upper sheet and the lower sheet. A touch panel having electrodes for applying a voltage to the resistive film, A polarizing plate bonded to the lower sheet of the touch panel to convert visible light into linearly polarized light, a liquid crystal display device including an upper glass, a liquid crystal, and a lower glass to which the polarizing plate is bonded, and a lower glass of the liquid crystal display device. In a touch panel integrated flat panel display made of another polarizing plate, The touch panel integrated flat panel display, Dot spacers formed between the transparent conductive films of the upper sheet and the lower sheet are arranged on the lower sheet to bond the upper and lower plates, The polarizing plate to be bonded to the lower sheet is composed of an upper substrate, an optical film substrate, and a lower substrate in order to be bonded to the lower sheet of the touch panel on the upper surface of the upper substrate, and the adhesive layer to bond the polarizing plate to the touch panel and to the bottom of the lower substrate of the polarizing plate. It consists of a polarizing plate having another adhesive layer for bonding the polarizing plate integrated in the touch panel to the upper glass of the liquid crystal display device, And a polarizing plate which is brought into contact with the lower glass of the liquid crystal display device, in turn, is laminated with an adhesive layer, an upper substrate, an optical film substrate, and a lower substrate, and is bonded to the lower glass of the liquid crystal display device. The method of claim 1, The adhesive layer on the upper surface of the polarizing plate is a touch panel integrated flat panel display, characterized in that made of a front deposition surface of a constant thickness covering the entire upper surface of the polarizing plate.