JP3153970U - Touch panel stag layer combination structure - Google Patents

Abstract

When a touch panel is assembled and used, a stag layer combination structure of a touch panel that can form a flat and well-defined appearance, simplify the structure, and reduce the cost is provided. A stag layer combination structure of a touch panel includes a touch sensor, which is installed between a top plate and a base plate, and the top plate and the base plate are transparent optically isotropic. Light adjustment layers 3 and 4 are provided on the surfaces of the top plate 1 and the base plate 2 respectively, and each of the light adjustment layers 3 and 4 is a polarizing thin film 31, a retardation thin film 32, or an optically isotropic thin film. 1 or a combination of two or more thin film stag layers, and a color edge frame 315 is installed on the bottom surface of the optical thin film of the light control layers 3 and 4 above the top plate 1 at the peripheral portion. On the outermost optical thin film surface of the light control layers 3 and 4 above the top plate 1, an atomized film or a hard coating film which is a functional thin film is provided. [Selection] Figure 1

Description

  The present invention relates to a stag layer combination structure of a touch panel, and more particularly, to a stag layer combination structure of a touch panel having anti-reflection, flat and tidy beauty.

  With the rapid development of panel manufacturing technology in recent years, touch panels have been widely applied to consumer electronic products such as mobile phone terminals, digital cameras, digital music players (MP3), PDAs, and GPS. In these electronic products, the touch panel is arranged on a display, and the user can perform an interactive input operation. In this way, communication between a person and a device can be remarkably smoothed, and the efficiency of input operations can be improved. However, whether or not the usage state of the touch panel is ideal is greatly influenced by the external environment. For example, when the light used in the outdoors or in the usage environment is relatively strong, the surface of the panel causes a reflection phenomenon due to irregular reflection of incident light from the outside. As a result, the visibility of the content displayed on the display below the touch panel is poor or cannot be identified. In addition, most of the combination methods of touch panels and displays used in general electrical products are currently using a cover frame structure, and the touch panel is placed in front of the display by pressing and fixing the four peripheral edges of the touch panel. is doing. In addition to the purpose of fixing the panel, the cover frame has a function of beautifying the structure because it can shield the discrete signal conductors at the peripheral edges of the touch panel. However, the installation of the cover frame creates a bumpy surface with a height difference, which detracts from the aesthetics of the product design. In addition, when wiping the panel surface in the frame, dust easily enters the gap between the cover frame and the touch panel, causing hygiene problems, and dust and dirt accumulate in the gaps on the frame edge. It is easy for malfunctions to occur. Furthermore, since the signal conductor structure in the peripheral part of the touch panel is usually relatively weak, if dust enters, it may be damaged if continuously pressed, resulting in a signal transmission failure phenomenon. In addition, dirt that has entered the gap between the frame edges also destroys the tight bonding between the outer shell and the touch panel, affects the waterproof and dustproof effects, and may cause damage to the internal electronic parts. The present invention has been made in view of the above-described drawbacks of the conventional stag layer combination structure of a touch panel.

  The problem to be solved by the present invention is that a light control layer is installed on the surface of the top plate and the base plate of the touch panel, the projected light is corrected, the reflection phenomenon is prevented, and the light control layer on the top plate has a peripheral portion. To provide a stag layer combination structure of a touch panel that can form a flat and neat appearance, simplify the structure, and reduce the cost when installing a color edge frame, thereby assembling and using the touch panel It is.

In order to solve the above problems, the present invention provides a stag layer combination structure of a touch panel described below.
The touch panel stag layer combination structure has a touch sensor,
The touch sensor is installed between the top plate and the base plate, and the sensing signal of the touch sensor is transmitted to the signal processing circuit through the signal conductor installed on the side edge,
The top plate and the base plate are substantially transparent optical isotropic thin plates, and a first light adjusting layer composed of a single layer or a multilayer optical thin film is provided on the surface of the top plate. And, on the bottom surface of the optical thin film of the first light adjustment layer, a color edge frame is installed at the peripheral portion,
The base plate surface can also be provided with a second light adjusting layer,
The first and second light control layers are constituted by combining a thin film stag layer of one kind or two or more kinds of optical thin films such as a polarizing thin film, a retardation thin film, or an optical isotropic thin film,
Between the thin film stag layers of the light control layer, pressure-sensitive adhesive tape (PSA) is used and adhered and combined, thereby providing a stress releasing ability between the thin film stag layers, and shifting between the stag layers due to thermal stress or Can prevent structural deformation,
The color edge frame uses an organic material such as ink, a color photoresist, or an inorganic material, and is an opaque thin layer having a thickness of about 1 to 12 μm or nearly opaque by a technique such as printing, coating, or metal deposition. Install a thin layer,
The substantially transparent optically isotropic thin plate is made of a material such as polymethacryl (PMMA), polyethersulfone (PES), polyolefin polymer (COC), polycarbonate (PC), or glass,
The transparent optically isotropic thin plate such as PC, PES, PMMA, COC is suitable for the ITO thin film adopted by the sensing layer because it has the property of preventing the polarization of incident light, thereby making the touch panel stag The layer combination structure achieves the performance of high transparency, low efficiency, low stability,
Each of the light control layers suppresses reflected light caused by strong external light, prevents a dazzling reflection phenomenon, and realizes a good display screen with high contrast ratio and high visibility. When installed on the front of the LCD, the visibility of the display content on the display can be improved, especially in outdoor environments where the light rays are intense,
Moreover, when using the color edge frame installed in the first light adjustment layer and assembling and using the touch panel, it is not necessary to separately install components such as the edge frame, so the structure can be simplified. Reduces costs and, in use, achieves a case and a flat and tidy surface, achieves a smooth and beautiful appearance with excellent touch,
The outermost optical thin film surface of the first light control layer is coated on the surface using an atomized film that reduces light reflection and prevents screen display interference, or a hard UV curable paint. Thus, a functional thin film such as a hard coat layer is formed, and thus the surface can be resistant to scratches and dirt.

  In the stag layer combination structure of the touch panel of the present invention, a light adjusting layer is installed on the surface of the top plate and the base plate of the touch panel, thereby correcting the projected light beam and preventing the reflection phenomenon. In addition, a color edge frame is installed at the periphery of the light control layer on the top plate, so that when the touch panel is assembled and used, a flat and well-formed appearance is formed, the structure is simplified, and the cost is reduced. Can do.

In the stag layer combination structure of the present invention touch panel, it is a sectional view showing the structure of the first embodiment. It is sectional drawing which shows the structure of the 2nd Example in the stag layer combination structure of this invention touch panel. In the stag layer combination structure of the touch panel of the present invention, it is a sectional view showing the structure of the third embodiment. In the stag layer combination structure of the present invention touch panel, it is a sectional view showing the structure of the fourth embodiment.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings. The first embodiment of the stag layer combination structure of the present invention touch panel shown in FIG. 1 will be described using a capacitor type touch panel as an example, but is not limited to this, and may be applied to a register type touch panel or an electromagnetic touch panel. it can.

  In the first embodiment, the capacitor touch sensor 5 is installed between the top plate 1 and the base plate 2 in an insulated state. On the surfaces of the top plate 1 and the base plate 2, light adjusting layers 3 and 4 composed of single-layer or multilayer optical thin films are respectively installed. In addition, a pressure-sensitive adhesive tape (PSA) is adopted for bonding between the stag layers, and the conventional adhesive used for the resin film is replaced. Since the pressure-sensitive adhesive tape can retain elasticity even after bonding, it has a stress releasing ability. Therefore, it is possible to prevent the occurrence of shift and structural deformation between the stag layers due to thermal stress.

  The capacitor touch sensor 5 includes an X-axis sensitive layer 51, a Y-axis sensitive layer 52, and an insulating layer 53. The insulating layer 53 is installed between the X and Y axis sensitive layers 51 and 52 to insulate the two sensitive layers. As a result, the X and Y axis sensitive layers 51 and 52 are grounded and connected to a control circuit (not shown). The X and Y axis sensitive layers 51 and 52 use indium tin oxide (ITO) thin films. The X and Y axis sensitive layers 51 and 52 and the insulating layer 53 are all thin layers that are substantially transparent. The capacitor-type touch sensor 5 can be input by touching with a user's finger or conductor, generates a capacitor effect at the moment of touching, and determines the position of the hand or conductor using the change in the capacitor value.

  Top plate 1 and base plate 2 are substantially transparent optically isotropic thin plates made of glass plate, polymethacrylic (PMMA), polyethersulfone (PES), polyolefin polymer (COC) or similar. And having the characteristic of preventing the polarization of incident light. Therefore, it is suitable for use according to the ITO thin film of the sensitive layers 51 and 52.

  The light adjustment layer 3 on the surface of the top plate 1 includes a polarizing thin film 31 and a retardation film 32. The light adjustment layer 4 on the surface of the base plate 2 is a retardation film 41. The polarizing thin film 31 is configured by sandwiching a polyvinyl alcohol (PVA) film between two layers of triacetyl cellulose (TAC) film using an adhesive. The PVA film stretches and forms birefringence. Usually, the PVA film has a thickness of about 15 to 30 μm, and the two TAC films have a thickness of 140 to 180 μm. Each of the retardation films 32 and 41 is manufactured by polycarbonate (PC).

  An LCD 8 is further installed on the bottom of the base plate 2 of the touch panel. The LCD 8 has a conventional structure and is provided with a pair of polarizing thin films 81 and 82, and a liquid crystal chamber 83 is interposed between them. In addition, a backlight 9 is usually installed at the bottom of the LCD 8 to provide light necessary for the operation of the LCD 8.

  Since the polarizing thin film 31 and the retardation thin films 32 and 41 that are light adjusting layers are provided on the surfaces of the top plate 1 and the base plate 2 of the touch panel, even if light enters the touch panel from the outside and is reflected inside the panel. Each reflected light never leaves the touch panel. Therefore, an outdoor user can clearly see the display contents on the LCD 8 and is not dazzled and hard to see. The light emitted from the backlight 9 of the LCD 8 is projected to the outside and is not obstructed by the polarizing thin film 31 and the retardation film 32 that prevent reflection. Therefore, since sufficient light can be obtained, there is no need to increase the output of the backlight 9, and a high discrimination effect can be provided. The display contents on the LCD 8 are also effectively improved by the light adjusting layers 3 and 4.

  Further, color edge frames 315 are installed on the four peripheral edges of the lower surface of the polarizing thin film 31. The color edge frame 315 is an opaque or nearly opaque coating layer, and is set to a thickness of about 2 μm at four peripheral edge portions on the bottom surface of the polarizing thin film 31 by using an ink and printing or coating technique. The color edge frame 315 on the lower surface of the polarizing thin film 31 eliminates the need for installing a decorative frame structure when installing the touch panel. Thus, the installation structure of the touch panel can be simplified, the cost can be reduced, and a flat and well-equipped surface can be formed when used. That is, it is possible to form an appearance that is flat, smooth, beautiful, and excellent in touch.

  On the other hand, the arrangement of the light control layers 3 and 4 is arbitrary, and can be adjusted according to the use conditions of the touch panel. In the second embodiment shown in FIG. 2, a polarizing thin film 31 and a retardation thin film 32 are provided on the light adjusting layer 3 on the surface of the top plate 1. However, the installation of the light adjusting layer 4 on the lower surface of the base plate 2 is omitted. Further, in the third embodiment shown in FIG. 3, only the polarizing thin film 31 is provided on the light adjustment layer 3 on the surface of the top plate 1, and the light adjustment layer 4 on the lower surface of the base plate 2 is omitted. In the second and third embodiments, a color edge frame 315 is installed on the lower surface of the polarizing thin film 31. Thereby, the composed touch panel is flat and tidy, and has an elegant appearance and a smooth surface. As described above, even if a part of the light adjustment layers 3 and 4 is modified, the antireflection function and the function of improving the degree of identification of display display contents provided in the combined touch panel are the same as in the first embodiment. However, the touch panel having the structure shown in the second and third embodiments is generally suitable for use in the case where the external light beam is not intense, such as indoors or not directly irradiated with sunlight.

  The structure of the fourth embodiment shown in FIG. 4 is almost the same as the structure shown in the first embodiment, but the difference between the two is that in the fourth embodiment, the outermost surface of the touch panel stag layer, that is, the polarizing thin film 31. In the point that the atomization film 316 is installed on the upper surface, it is possible to reduce interference with the screen display due to light reflection. Alternatively, in the fourth embodiment, an atomized film 316 can be formed by applying a high-hardness UV curable coating on the surface. Thereby, the resistance performance with respect to the crack and dirt of the surface can be enhanced. The low reflection, contamination prevention, and high hardness installation performed on the outermost surface of the touch panel stag layer described above can improve its practicality and durability.

  The names and contents of the present invention are only used for explaining the technical contents of the present invention, and do not limit the present invention. All equivalent applications based on the spirit of the present invention, conversion, replacement of parts (structure), and increase / decrease in quantity shall be included in the protection scope of the present invention.

  The present invention has the novelty that is a requirement of the utility model, has sufficient progress compared to the conventional similar products, has high practicality, meets the needs of society, and has a very high industrial utility value .

DESCRIPTION OF SYMBOLS 1 Top plate 2 Base plate 3 Light adjustment layer 31 Polarization thin film 315 Color edge frame 316 Atomization film 32 Phase difference thin film 4 Light adjustment layer 41 Phase difference thin film 5 Capacitor type touch sensor 51 X-axis sensitive layer 52 Y-axis sensitive layer 53 Insulation Layer 8 LCD
81, 82 Polarized thin film 83 Liquid crystal chamber

Claims (12)

With touch sensor,
The touch sensor is installed between a top plate and a base plate, and a sensing signal of the touch sensor is transmitted to a signal processing circuit through a signal conductor installed on a side edge,
The top plate and the base plate are substantially transparent optically isotropic thin plates, and on the surface of the top plate, a first light adjusting layer composed of a single layer or a multilayer optical thin film is disposed, and the first plate A stag layer combination structure of a touch panel, characterized in that a color edge frame is installed on the bottom surface of the optical thin film of the one light adjusting layer at a peripheral portion.   The optically isotropic thin plate with the top plate and the base plate selected is made of a material such as polymethacrylic (PMMA), polyethersulfone (PES), polyolefin polymer (COC), polycarbonate (PC), or glass. The stag layer combination structure of a touch panel according to claim 1, wherein the structure is manufactured.   The said 1st light control layer is comprised combining 1 type or 2 or more types of thin film stag layers of optical thin films, such as a polarizing thin film, a phase difference thin film, or an optical isotropic thin film. The stag layer combination structure of the touch panel.   4. The stag layer combination structure of a touch panel according to claim 3, wherein a pressure sensitive adhesive tape (PSA) is used between the thin film stag layers of the first light control layer to bond them together. 5.   The color edge frame is made of an organic material such as ink or color photoresist, or an inorganic material, and is provided with a thin layer that is opaque or nearly opaque by a technique such as printing, coating, or metal vapor deposition. The stag layer combination structure of a touch panel according to claim 1.   6. The touch panel stag layer combination structure according to claim 5, wherein the color edge frame has a thickness of about 1 to 12 [mu] m.   The touch panel stag layer according to claim 1, wherein the stag layer combination structure of the touch panel further comprises a second light adjusting layer composed of a single layer or a multilayer optical thin film disposed on one surface of the base plate. Combination structure.   The said 2nd light control layer is comprised combining 1 type or 2 or more types of thin film stag layers of optical thin films, such as a polarizing thin film, a phase difference thin film, or an optical isotropic thin film. The stag layer combination structure of the touch panel.   The touch panel stag layer combination structure according to claim 8, wherein a pressure sensitive adhesive tape (PSA) is used between the thin film stag layers of the second light control layer to bond them together.   The stag layer combination structure of a touch panel according to claim 1, wherein the stag layer combination structure of the touch panel further comprises a functional thin film disposed on the outermost optical thin film surface of the first light adjustment layer.   The stag layer combination structure of a touch panel according to claim 10, wherein the functional thin film is an atomization film.   The stag layer combination structure of a touch panel according to claim 7, wherein the functional thin film is a hard coat layer.

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