JP2012238292A - Dirt-adhesion prevention member for touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive dirt-adhesion prevention member capable of entirely preventing fingerprints or sebum stains on a liquid-crystal display surface of a touch panel or the like.SOLUTION: A mesh member 1 made of material consisting of extremely thin fibers covers a surface of a touch panel 2. With this configuration, a finger of an operator touches the mesh member 1 and does not directly touch a liquid-crystal display surface of the touch panel 2. Consequently, fingerprints and sebum do not attach the liquid-crystal display surface through the operation finger, whereby fingerprints marked on the liquid-crystal display surface in operation are completely invisible.

Description

  The present invention relates to a dirt adhesion preventing material for preventing adhesion of fingerprints, sebum, and the like to the surface of a known liquid crystal display device such as a touch panel or a mobile phone.

In recent years, many liquid crystal display devices such as portable information terminals using a liquid crystal display or navigation devices for automobiles have been widely used.
It is also known that these liquid crystal display devices can be used as a touch panel operation input device by combining the functions of a known touch sensor.

  As a detection sensor for such a touch panel, a method of detecting a pressing position on the liquid crystal display device by detecting a pressing force of a finger to be operated and detecting it as operation position coordinates, and a matrix shape provided on the surface of the liquid crystal display device The position of the operation finger is specified by electrically detecting the capacitance value of the XY transparent electrode pair, or the operation finger is operated by the LED and the light receiving element installed on the opposite side of the liquid crystal display device. Techniques such as detecting the position are known.

As described above, in a touch panel in which operation input is performed by operating the surface of the liquid crystal display device with a finger, fingerprints and sebum stains attached to the surface of the touch panel are problematic.
Furthermore, even in a liquid crystal display device that does not include a touch sensor, particularly in a small portable information terminal, fingerprints and sebum stains also become a problem due to the finger touching the surface of the liquid crystal display device. Yes.

  Therefore, in view of the above problems, liquid crystal display devices have been improved by reducing the adhesion of fingerprints and improving the ease of wiping off the attached fingerprints by applying a hard coat made of a surface-active substance on the surface of the liquid crystal display device or coating with a fluororesin. There has been proposed a technique relating to a dirt adhesion preventing means for maintaining a good appearance of the display device surface.

  JP 2005-186484 A

  However, although the conventional technique can reduce the adhesion of fingerprints, it cannot be completely eliminated. Further, the manufacturing process of the dirt adhesion preventing means, such as hard coat processing of a surface active substance, is complicated, resulting in an expensive material.

  Further, the dirt adhesion preventing member subjected to such processing is a sheet-like member separate from the liquid crystal display device, and when the user later attaches the sheet member to the liquid crystal display device, the sheet member and the It is obvious that there is a drawback that the appearance is deteriorated by the bubbles remaining between the liquid crystal display device.

  In addition, in the capacitive touch panel, the detection sensitivity of the operating finger may be reduced by attaching a thick non-conductive member to the surface of the liquid crystal display device.

  The present invention has been made in view of the above-described problems, and is low-cost, can completely prevent adhesion of fingerprints and sebum, can maintain a good appearance of a liquid crystal display device for a long time, and can be used by a user. A new touch panel that does not cause any deterioration in appearance due to bubbles or the like and does not cause a decrease in detection sensitivity in a capacitive touch panel even when the touch panel dirt adhesion preventing material of the present invention is attached to the liquid crystal display device later. It aims at providing a dirt adhesion prevention material.

  The touch-panel dirt adhesion preventing material of the present invention is characterized by being composed of a plurality of fibrous fine wire materials running in parallel with the touch panel surface.

  In one aspect of the touch panel dirt adhesion preventing material of the present invention, it is constituted by a fibrous fine wire material that runs parallel to the surface of the touch panel and is knitted in a mesh shape.

  In one aspect of the tatter panel antifouling material of the present invention, a mesh-like shape in which a fibrous fine wire material having a thickness of 0.3 mm or less and a distance of at least twice the thickness is run in parallel with the touch panel surface. Configured.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, the touch-sensitive material is composed of the above-described fibrous fine wire material formed of a thread-like material made up of a plurality of ultrafine single fibers.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, the fibrous fine wire material is formed of a resin molding material.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, the touch-sensitive material is composed of the above-described fibrous fine wire material having elasticity.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, the tatter panel is constituted by the above-described fibrous thin wire material which is substantially black.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, it is constituted by the above-described fibrous fine wire material that is substantially transparent or milky white and light transmissive.

  In one aspect of the touch panel dirt adhesion preventing material of the present invention, the touch-sensitive material is composed of the above-described fibrous fine wire material coated with a non-slip material such as a silicon rubber film.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, the touch panel surface is composed of the fibrous thin wire material in which a pattern made of an arbitrary color is printed on the surface in the visible direction.

  In one aspect of the touch panel stain adhesion preventing material of the present invention, it is constituted by the above-described fibrous fine wire material formed of a material that repeatedly includes electrical conductivity and non-conductivity at a predetermined pitch in the longitudinal direction.

  According to the touch panel dirt adhesion preventing material of the present invention, since the touch panel surface is covered with a mesh material made of an extremely thin fibrous material, an operator's finger touches the fibrous material, There is no direct touch on the liquid crystal display surface of the touch panel. However, since fingerprints and sebum do not adhere to the surface of the liquid crystal display device through the operation finger, it is possible to provide a touch panel contamination prevention material that can completely hide the fingerprint marks on the surface of the liquid crystal display device in use. it can.

  It should be noted that the fingerprint attached to the surface of the fibrous material is the same as when the so-called cloth product is touched with bare hands, and no visible fingerprint trace remains regardless of the color tone of the cloth product. No.

  The fibrous thin wire material in the touch-screen dirt adhesion preventing material of the present invention is configured such that the light emission luminance of the liquid crystal display device is appropriately adjusted by appropriately adjusting the thickness of the fibrous thin wire material and the interval between the plurality of the arranged thin fibrous materials. While maintaining the desired legibility without disturbing, the necessary strength of the material is ensured, and the operation finger does not directly touch the surface of the outer liquid crystal display device, thereby completely preventing the adhesion of fingerprints and sebum. be able to.

  Moreover, since the said fibrous fine wire material in the touchscreen dirt adhesion prevention material of this invention made it the structure which knit the thread-like raw material in the mesh shape, it can be manufactured by the process similar or the same as what is called a stocking for women, etc. Therefore, it can be easily manufactured at a low price.

  Furthermore, since the said fibrous fine wire material in the touch-panel dirt adhesion preventing material of this invention consists of a well-known resin molding material, it can be supplied at a very low price.

  In addition, since the fibrous fine wire material in the touch panel dirt adhesion preventive material of the present invention is composed of a stretchable material, the touch panel surface can be easily and uniformly fitted to improve the appearance and is attached. Ease is improved.

  Moreover, since the said fibrous fine wire material in the touch-panel dirt adhesion prevention material of this invention was comprised with the black material, the texture of appearance improves by setting it as a black design at the time of the said liquid crystal display device being deenergized.

  On the other hand, if the fibrous fine wire material in the touch panel dirt adhesion preventing material of the present invention is made of a substantially transparent material, the liquid crystal display device is less susceptible to luminance reduction and visibility is improved.

  Furthermore, since the fibrous fine wire material in the touch panel dirt adhesion preventing material of the present invention is coated with a non-slip material such as a silicon rubber film on a portion in contact with the surface of the liquid crystal display device, the surface of the liquid crystal display device is operated during operation with a fingertip. It is possible to eliminate a sense of incongruity in operation due to the sliding of the touch panel dirt adhesion preventing material covering the cover.

  In addition, since the fibrous fine wire material in the touch panel dirt adhesion preventing material of the present invention is formed by printing a pattern made of an arbitrary color on the surface in the visible direction of the touch panel surface, it is optional when the liquid crystal display device is not energized. Thus, the design value can be given even when the touch panel is not operated.

  Moreover, since the said fibrous fine wire material in the touch-panel dirt adhesion prevention material of this invention shall be formed with the material which repeatedly comprised the electroconductivity and the nonelectroconductive at a predetermined pitch in the longitudinal direction, the touchscreen of the said invention Even if the antifouling material is attached to the electrostatic capacitance type touch panel, the problem that the detection sensitivity of the operation finger is lowered does not occur.

  It is the top view and side view of a liquid crystal display device which comprise the touch panel which attached the touchscreen dirt adhesion prevention material concerning the embodiment of the present invention.   It is the figure which combined the cross-sectional enlarged view of the touch panel with which the touch-panel dirt adhesion preventing material which concerns on embodiment of this invention was mounted | worn, and an operation finger.   It is a figure showing the mesh shape formed with the fibrous fine wire material based on embodiment of this invention.   It is a figure showing the thickness and arrangement | positioning of a fibrous fine wire material based on embodiment of this invention.   It is a figure showing the anti-slip | skid material apply | coated to the fibrous fine wire material based on embodiment of this invention.   It is a display image during energization to a liquid crystal display device in a touch panel with a touch panel dirt adhesion prevention material concerning an embodiment of the present invention.   4 is a design displayed during non-energization of a liquid crystal display device in a touch panel equipped with a touch panel dirt adhesion preventing material according to an embodiment of the present invention.   It is the figure which gave the partial electroconductivity to the fibrous fine wire material based on embodiment of this invention with a predetermined pitch.   It is the figure which showed mounting | wearing to a mobile telephone apparatus by shape | molding the touchscreen dirt adhesion preventing material into a bag shape based on embodiment of this invention.

  As described above, the touch panel dirt adhesion preventing material of the present invention has an excellent dirt prevention function that is completely free from dirt on the liquid crystal display device due to adhesion of fingerprints and sebum through the operation fingers, unlike the conventional technology for the same purpose. is doing.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a plan view and a side view of a liquid crystal display device comprising a touch panel equipped with a touch panel stain adhesion preventing material according to an embodiment of the present invention, and 1 is a touch panel stain adhesion preventing material of the present invention. Reference numeral 2 denotes a known liquid crystal display device with a touch panel (hereinafter referred to as a touch panel).

  FIG. 2 shows an enlarged view of the cross section of the touch panel to which the touch panel dirt adhesion preventing material 1 of the present invention shown in FIG. 1 is attached and the operation finger 3, and 1 a is an example of the cross-sectional shape of the fibrous fine wire material. Is a touch panel.

  As shown in FIG. 1, the touch panel dirt adhesion preventing material 1 according to the present invention is disposed in close contact with the touch panel 2 so as to cover the touch panel 2. In addition, as shown in FIG. 2, when a predetermined portion on the surface side of the touch panel 2 is pressed by the operation finger 3, a pressing force F acts via the fibrous fine wire material 1a, and a known touch detection function (not shown) 2 It is detected that a predetermined part on the surface has been pressed.

  Since it comprised as mentioned above, according to the touch-panel dirt adhesion preventing material of this invention, since the operation finger 3 and the touch panel 2 do not touch directly, the fingerprint or sebum of the operation finger 3 adheres to the surface of this touch panel 2. In addition, an excellent effect that the surface of the touch panel 2 is not soiled can be obtained.

  Also, the fingerprint attached to the surface of the fibrous fine wire material 1a is the same as when the so-called cloth product is touched with bare hands, and no visible fingerprint trace remains.

FIG. 4 is a diagram showing the disposition requirements of the thin fibrous wire material 1a of the touch panel dirt adhesion preventing material 1 of the present invention. As shown in FIG. The arrangement interval G of the arranged fibrous thin wire materials 1a is
G> D × 2
It is as.

  By the way, since a general yarn material is colored, the liquid crystal display device of the touch panel 2 does not transmit a light source that emits light. Therefore, there is a problem that covering the touch panel 2 with the touch panel dirt adhesion preventing material 1 causes a decrease in display luminance and / or a decrease in visibility of the touch panel.

Therefore, the touch panel stain adhesion preventing material 1 of the present invention has a thickness D of the fibrous fine wire material 1a of 0.3 mm or less, and a gap G that is twice or more the thickness of the fibrous fine wire material 1a. By disposing the fibrous thin wire material 1a at a distance, it is possible to minimize a decrease in luminance and a decrease in visibility of the touch panel 2.
Furthermore, the said fibrous fine wire material 1a can further improve the brightness | luminance fall and visibility fall of the said touch panel 2 by comprising with a transparent or light transmissive milky white material.

  In addition, the touch panel dirt adhesion preventing material 1 of the present invention in FIG. 1 is an intersecting portion of the two sets of fibrous fine wire materials 1a when the two sets of fibrous fine wire materials 1a running in parallel with the surface of the touch panel 2 are orthogonal to each other. However, the arrangement of the fibrous thin wire material 1a may be arranged in a triangular shape as shown in FIG.

  Further, when the fibrous fine wire material 1a is made stretchable, the adhesion to the touch panel 2 is good, the appearance is improved, and the touch panel dirt adhesion preventing material 1 is easily attached to the touch panel 2.

On the other hand, when the operation finger 3 touches the touch panel dirt adhesion preventing material 1 by making the fibrous fine wire material 1 a stretchable, the touch panel dirt adhesion preventing material 1 is operated by sliding on the surface of the touch panel 2. It is also possible that the sex deteriorates.
However, the fibrous fine wire material 1a of the touch panel dirt adhesion preventing material 1 of the present invention has a non-slip 10 made of silicon rubber or the like applied to the portion in contact with the surface of the touch panel 2 as shown in FIG. This prevents the touch panel dirt adhesion preventing material 1 from slipping and improves operability.

  Since the touch panel dirt adhesion preventing material of the present invention is configured as described above so that the surface of the touch panel is covered with a mesh material made of an extremely thin fibrous material, an operator's finger can directly touch the touch panel surface. No. However, since fingerprints and sebum do not adhere to the surface of the liquid crystal display device through the operation finger, it is possible to provide a touch panel contamination prevention material that can completely hide the fingerprint marks on the surface of the liquid crystal display device in use. it can.

  Furthermore, since the touch panel dirt adhesion preventing material of the present invention appropriately sets the thickness and the arrangement interval of the fibrous material, it can reduce the display brightness of the liquid crystal display device on the touch panel and minimize the visibility. No.

  In addition, since the touch panel dirt adhesion preventing material of the present invention is made of a stretchable mesh material, it can be easily attached to the touch panel and can be adhered to the touch panel surface.

  Moreover, since the touchscreen dirt adhesion prevention material of this invention has arrange | positioned the anti-slip | skid in the site | part which contacts a touchscreen, this touchscreen dirt adhesion prevention material does not slip on the touchscreen surface at the time of operation, and an operation feeling does not deteriorate.

In general, a touch panel has a substantially black surface when the panel is not in operation / when the panel is not energized, and has no design value.
Then, it constituted so that the design value in the said touch panel non-operation might be brought about by drawing a predetermined design on the touch panel surface during non-operation by the touch panel dirt adhesion prevention material 1 of the present invention.

  Hereinafter, a second embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 7 shows the touch panel dirt adhesion preventing material 1 of the present invention in which a desired image is printed on the surface of the fibrous fine wire material 1a.

Since the liquid crystal display device of the touch panel does not emit light when the touch panel 2 is not energized, the back surface of the touch panel dirt adhesion preventing material 1 is black.
However, the printed color attached to the surface of the fibrous fine wire material 1a of the touch panel stain adhesion preventing material 1 reflects the light source from the surrounding environment and is visually observed as a desired design.

Next, when the touch panel 2 is energized, a predetermined display image is emitted and displayed on the liquid crystal display device of the touch panel 2 as shown in FIG.
At this time, the light emission luminance of the liquid crystal display device is set sufficiently higher than the brightness of the surrounding environment. As a result, even when the surrounding environment is bright, the image of the liquid crystal display device can be clearly seen.

However, since the desired image printed on the surface of the fibrous fine wire material 1a is shaded by the light source of the liquid crystal display device, it is not visually recognized as the printed image as in the case of the non-energization.
In this way, the touch panel 2 acts as a normal display function during energization, while the non-energization of the touch panel 2 displays a desired design printed on the touch panel dirt adhesion prevention material 1. Even when the touch panel 2 is not energized, it is possible to give added value as a design display.

As is well known, a touch panel equipped with the capacitive touch sensor functions in response to a change in capacitance between the surface of the touch panel and an operation finger. Therefore, when an electrically insulating sheet or the like is attached to the touch panel surface, this capacitance change is hindered, and the sensor function may not function normally.
Then, Example 3 of the touch-panel dirt adhesion prevention material 1 of this invention aims at solving this subject.

  Hereinafter, a third embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 8 is a cross-sectional view in which the touch panel dirt adhesion preventing material 1 is mounted on the surface of the capacitive touch panel 2, and 1a is a fibrous fine wire material linearly arranged in the left-right direction of the figure. 2 is a touch panel, 20 is a surface glass in the liquid crystal display device of the touch panel 2, and 21 is an electrode of a capacitive touch sensor.

  The fibrous fine wire material 1a is made of an organic compound such as nylon and usually has electrical insulation. However, the fibrous fine wire material 1a in the present embodiment includes the conductive portions 12 and the nonconductive portions 11 alternately at a predetermined pitch P. The conductive part is formed as if it has conductivity by partially heating and carbonizing the fibrous fine wire material 1a.

When the touch panel dirt adhesion preventing material 1 is not attached, the capacitance C1 between the operation finger 3 and the electrode 21 detected by the capacitive touch sensor is:
C1 = εs / D1
(Ε: relative dielectric constant, s: facing area between electrode and finger, D1: distance between finger and electrode).
However, if the touch panel dirt adhesion preventing material 1 is attached and the entire fibrous fine wire material 1a is non-conductive, the capacitance between the operation finger 3 and the electrode 21 detected by the capacitive touch sensor. C2 is
C2 = εs / D0
Since D0> D1, C1> C2, and the value of the detected capacitance C2 is smaller than C1, and the detection sensitivity of the capacitive touch sensor is lowered.

Therefore, since the fibrous fine wire material 1a in the present embodiment has conductive portions at a predetermined pitch P as described above, the electrical position of the operation finger 3 is equivalently the liquid crystal display device of the touch panel 2 It will be located in the surface of the surface glass 20 in.
That is, since the distance between the operation finger 3 and the electrode 21 is equivalent to D1, the detection sensitivity of the capacitive touch sensor does not decrease despite the provision of the fibrous thin wire material 1a. Such excellent effects can be obtained.

  The touch panel dirt adhesion preventive material of the present invention prevents adhesion of fingerprints, sebum, or similar dirt via an operation finger to a liquid crystal or a display device similar thereto, regardless of the presence or absence of a touch sensor function. Therefore, it is possible to supply such an antifouling material at a low cost.

  Furthermore, the final form of use of the touch panel dirt adhesion preventing material of the present invention is to add a frame material (not shown) to the touch panel dirt adhesion preventing material so that it can be attached to and detached from the touch panel. An adhesion preventing material may be attached to the touch panel. As a result, when excessive dirt is generated on the touch panel dirt adhesion preventing material, it can be washed and reused.

  In addition, as shown in FIG. 9, the touch panel stain adhesion preventing material of the present invention is sewed into a bag shape, and the rubber cord 1b is attached to the opening, and then the portable information terminal is connected to the bag shaped touch panel stain adhesion preventing material. It is an easily assumed event that it may be used by inserting it into

1: Touch panel dirt adhesion preventing material, 2: Touch panel, 3: Operating finger, 4: Mobile information terminal, 1a: Fibrous thin wire material, 1b: Mesh, 10: Non-slip, 20: Glass, 21: Electrode

Claims (11)

  Touch panel dirt adhesion preventing material for touch panel dirt, which prevents adhesion of dirt such as fingerprints and sebum on the surface of the touch panel, and is composed of a plurality of fibrous fine wire materials running in parallel with the touch panel surface. Wood.   2. The touch panel stain according to claim 1, wherein the fibrous fine wire material has a mesh shape that runs parallel to the surface of the touch panel and is knitted by the fibrous fine wire material so that a substantially n-gonal shape is continuous. Anti-adhesive material.   The plurality of fibrous fine wire materials have a thickness of 0.3 mm or less, and an interval formed by the plurality of fibrous fine wire materials is twice or more of the thickness. Item 3. The touch panel dirt adhesion preventing material according to Item 2.   4. The touch panel stain adhesion preventing material according to claim 1, wherein the fibrous fine wire material is a thread-like material formed by combining a plurality of ultrafine single fibers. 5.   4. The touch panel dirt adhesion preventing material according to claim 1, wherein the fibrous fine wire material is a resin molding material. 5.   6. The touch panel dirt adhesion preventive material according to claim 1, wherein the fibrous fine wire material has elasticity.   7. The touch panel dirt adhesion preventing material according to claim 1, wherein the fibrous fine wire material is substantially black.   7. The touch panel dirt adhesion preventive material according to claim 1, wherein the fibrous fine wire material is substantially transparent or milky white.   9. The touch panel stain adhesion preventing material according to claim 1, wherein an anti-slip material comprising a silicon rubber film or the like is applied to at least the surface of the fibrous thin wire material on the touch panel side.   The touch-panel dirt adhesion preventive material according to any one of claims 1 to 9, wherein a pattern made of an arbitrary color is printed on the surface of the fibrous fine wire material in a visible direction of the touch panel surface.   11. The plurality of fibrous thin wire materials are formed of a material that repeatedly includes electrical conductivity and non-conductivity at a predetermined pitch in a longitudinal direction. Touch panel dirt adhesion prevention material.

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