Glass touch screen protector

A glass touch screen protector for a portable electronic device having a front face that includes a touch screen portion and a chamfered outer perimeter, the glass screen protector including a glass sheet having front and back sides, an outer band that corresponds to that of the device, and having a transparent window portion that corresponds in size to the touch screen portion. A spacer is provided along the outer perimeter of the glass sheet substantially continuously surrounding the transparent window. The spacer increases in thickness toward the periphery of the glass sheet and has a thickness sufficient to space the glass sheet near but not in contact with the touch screen portion. The spacer has an exposed adhesive facing the portable device and having adhesive strength enabling repeated removal and re-attachment.

FIELD

The present disclosure relates to a glass touch screen protector. In particular, the disclosure relates to a glass touch screen protector for mobile hand held devices.

BACKGROUND

With the ever increasing popularity of the touch screen portable electronic devices, a demand for effective touch screen protectors has developed. Several kinds of touch screen protectors are currently available. For example, many touch screen protectors employ polyethylene terephthalate (PET) or some type of transparent plastic to guard and protect the display screen. Additionally, many commercial touch screen protectors have a tendency to trap air bubbles and dust, despite careful application. When in use, the touch screen protectors are in direct physical contact with the touch screen of the electronic device, either by static or application of adhesives. Additionally, when the screen protectors are removed, diligent cleaning may be needed to restore the touch screen to its original luster.

DETAILED DESCRIPTION

It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant function being described. Also, the description is not to be considered as limiting the scope of the implementations described herein. It will be understood that descriptions and characterizations of embodiments set forth in this disclosure are not to be considered as mutually exclusive, unless otherwise noted.

The following definitions are used in this disclosure: The term “near” as used herein means close in distance but not in physical contact, for example about or less than 1 mm apart. The term “periphery” as used herein means the outermost part or region within a precise boundary. Accordingly the “peripheral direction” will be understood as extending from the interior toward the exterior outer periphery or edge of an area, such as a glass sheet. The term “touch screen portion” as used herein means the functional portion of the touch screen of the portable electronic device. The term “non-functional band around the perimeter” as used herein means the area surrounding the touch screen portion of the portable electronic device which can be made of a different material or made of the same material as the touch screen but is not touch sensitive. Generally, the term “touch screen” as used herein means a single glass sheet that includes the operable touch screen portion and the non-functional band around the perimeter of the touch screen portion. The touch screen may also include one or more inoperable portions, however, such touch screen will always include an operable touch screen portion. In many recent devices, the touch screen portion makes up the vast majority touch screen, with the non-functional band around the perimeter taking up only a small area of the touch screen. The term “front face” of a portable electronic device refers to the top surface which can be seen from an overhead view. The term “anti-static” is used to mean that the glass sheet does not generate static electricity when contacted or rubbed by the user.

A glass touch screen protector can be used to protect touch screens of many different kinds of portable electronic devices, such as a mobile telephone, reading device, music device, viewing devices, navigation device or other portable electronic devices. Examples of such devices are iPhone, Nook, iPod, iPad, Droid, and GPS navigation systems. The nature of the glass touch screen protector and its design enable specific embodiments to be adapted to conform to the touch screen of any such portable electronic device. For example, the shape of the glass touch screen protector can have corners that are rounded or beveled to match those of the portable electronic devices.

More recently, many portable electronic devices have begun to have a chamfered edge along the outer perimeter of the front face of the device. This chamfered edge can also be referred to herein as a beveled or curved edge. The chamfered edge refers a portion which connects the flat portion of the touch screen with a side edge of the device and which is not perpendicular to either. The chamfered edge portion around the perimeter can be either the touch screen and/or other segment of the front face surrounding the touch screen. In some instances, the touch screen will curve seamlessly to the side edge. In other examples, the touch screen may terminate and another component of the front face of the device may extend to the side edge. One example is shown inFIG. 1, where there is illustrated a portable electronic device10which is sized to be hand held. The portable electronic device10can have a touch screen20. The touch screen20has a touch screen portion35for operation of the device as well as non-functional band37around the perimeter40.

The portable electronic device10can also have a general functional button30as well as other functional buttons such as volume31,32or mute button33. Notably, the device10has a side edge45and a front face having flat (or substantially flat) portion50. The flat portion50of the touch screen20curves to the side edge45via chamfered portion55. In other examples, the side edge45is itself curved, arc shaped or parabolic, and in any of these instances the extreme end may be considered the side edge45. The chamfered portion55can be made up of a portion of the touch screen20. In some instances, prior to the chamfered portion55or along its length the touch screen20may terminate and the surface continue as a plastic or metal surface. Accordingly, the front face60of the portable device10includes both the flat surface50and the chamfered portion55, the entirety of which may be the touch screen20, or as noted, may terminate as it extends toward the periphery of the front face60and continue as a plastic or metal surface.

In some newer mobile devices, the non-functional band37is omitted, minimized or reduced. In such examples for example, there may be no non-functional band37on the lateral sides of the touch screen portion35but only above and below the touch screen portion35. Alternatively, the non-functional band may be absent from above and below the touch screen portion35, and only present on either lateral side of the entire surface of the touch screen20is functional having no non-functional band37. Alternatively, the non-functional band37is entirely omitted, and the entire touch screen20is functional (and thus the touch screen portion35is coextended and the same as the touch screen20). The entire front face60can be made up of the touch screen20, the entirety of which is functional, and considered the “touch screen portion.” In each of these cases, the front face still has the chamfered portion55.

In order to illustrate the chamfered portion, a cross-section view of portable electronic device10is illustrated inFIG. 2having a front face60with a flat portion50and an exaggerated chamfered portion55. In the illustrated embodiment, the touch screen20extends across the front face60to also include the flat portion50and chamfered portion55. The flat portion50extends horizontally within horizontal plane51. Additionally, the side edge45extends within vertical plane52. As shown, the chamfered portion55declines from the flat portion50to the side edge45. Accordingly, the chamfered portion55can be described as a ramped decline from the flat portion50. The chamfered portion55is not perpendicular with either the flat portion50or the on either side (the curved portion55). The chamfered portion55inFIG. 2is shown as slightly curved as it extends from the flat portion50to the side edge45. As shown, the chamfered portion declines at angle θ from the flat portion50to side edge45. The chamfered portion55may be straight, concave or otherwise curved. The chamfered portion55may also be considered as the portion of the front face which curves away from the flat portion50toward the periphery.

As described above, the side edge itself can be curved. For example as shown inFIG. 2A, the side edge45itself is curved. In such case we can consider the extreme side end to be side edge45which the chamfered portion55curves from the flat portion toward. Accordingly, the front face60has chamfered portion55which declines to side edge45.

A glass screen protector as disclosed herein can be employed to protect the touch screen of the portable electronic device10. However, glass is generally planar (or slightly convex when oriented properly on the device) and thus cannot generally bend to accommodate the chamfered portions of portable electronic devices. As further described below a spacer is disclosed herein which complements the declining shape of the chamfered portion in order to space the glass protector from the glass sheet of the portable electronic device. This permits the glass screen protector to extend across the entire front face of a portable electronic device to the outer edge of the device.

A top view of a glass touch screen protector in accordance with an exemplary embodiment is illustrated inFIG. 3. As shown, the glass touch screen protector100can correspond to the shape of a portable hand held device, and thus can be generally rectangular. However, the shape of the glass touch screen protector100is not limited to only generally rectangular shapes, but can be rounded or have other polygonal shape to correspond to the shape of a desired device and touch screen. The glass touch screen protector100can include a glass sheet102and a spacer (shown inFIGS. 5-7). The glass sheet102can be shaped and have dimensions that substantially correspond to the shape and dimensions of a front face of a portable electronic device. The glass sheet102can include a transparent window portion104and a band106surrounding the perimeter of the transparent window portion104. In some examples, the transparent window portion104and the band106can be a single component. In some embodiments the transparent window portion104and the band106can be different components. The transparent window portion104can substantially correspond to the touch screen portion of the portable electronic device. The light transmission of the transparent window portion104can be from 60 to 99%, alternatively from about 90%-99%. The band106can be opaque or non-opaque. Accordingly, in some embodiments, when the window portion104and the band106are the same embodiment, the opacity can be provided by a layer of ink or paint on the surface of the band106. In other embodiments, the band106can be tinted glass.

The band106can essentially conform to the non-functional band that surrounds the touch screen portion. The band106can include one or more holes108corresponding to one or more buttons of the portable electronic device. For example, as shown, the band106can have a hole108that corresponds to the on-off selector button of an iPhone or iPad. By exposing the buttons for ease of operation, the one or more holes108can act as alignment features to facilitate proper mounting of the glass touch screen protector100on the portable electronic device. In some phones, the non-functional band surround the touch screen portion may be omitted, minimized, or reduced. Accordingly, in some examples, the band106can be omitted from the glass touch screen protector100or only provided along the outer perimeter of the glass sheet102to help hide bubbles in the adhesive of the spacer (the spacer is further described below).

The glass sheet102can be sufficiently hard or stiff to prevent the glass sheet102from bending or collapsing under its own weight and/or to avoid the transparent window portion104being pressed against the touch screen portion when pressure is applied to the glass sheet102during normal use. For example, when pressure is applied to the transparent window portion104, the transparent window portion104may flex but should not contact the touch screen portion when a reasonable amount of pressure is applied to the transparent window portion104. To accomplish this, the glass sheet102can be sufficiently thin and have sufficient elasticity to withstand excessive pressure, for example, excessive pressure to cause the transparent window portion104to flex and contact the touch screen portion. The hardness of the glass sheet102can be between from 6 to about 9, alternatively from about 7 to about 9, as determined by Mohs scale of hardness values. In some embodiments, the hardness of the transparent window portion104can be more or less than about 6 and about 9 on the Mohs scale of hardness values.

The transparent window portion104can be made of any suitable transparent material available. The transparent window portion104can be silica based. In some embodiments, the transparent window portion104can be soda-lime glass, lead glass, flint glass, sodium borosilicate glass, oxide glass or any other suitable transparent material. In some embodiments, the transparent window portion104can be made of Willow Glass™ by Corning Inc. of Corning, N.Y.

FIG. 4illustrates a cross-sectional view of one example of a glass sheet102herein. The thickness of the transparent window portion104can be in the range of about 0.1 mm to 1.0 mm, or alternatively, 0.1 mm to 0.6 mm. The glass sheet can have a paint layer110on its underside. The paint layer110can be the band106which can essentially conform to the non-functional band that surrounds the touch screen portion of portable electronic device. The paint layer can be 1.0 mm or less in thickness. Additionally, an anti-shatter membrane115can be adhered to the underside of the paint layer110and glass sheet102. For example, because the paint layer110extends only around the perimeter of the glass sheet, the anti-shatter membrane115adheres to the paint layer110around this perimeter and directly to the glass sheet102around the interior portion (e.g. transparent window portion104) of the glass sheet102. If no paint layer110is provided, the anti-shatter membrane115can be adhered directly to the entire underside of the glass sheet102. Accordingly, the anti-shatter membrane adheres directly or indirectly to the underside of the glass sheet (beneath both the transparent window portion104and band106). The anti-shatter membrane prevents the glass sheet102from shattering, and if shatters, aids in preventing the glass from breaking into smaller scattered pieces which can endanger the fingers of a user. The anti-shatter membrane115can be made up of a transparent flexible polymeric material such as PET or other material. The anti-shatter membrane115can be adhered to the glass sheet and paint layer110by a strong adhesive, for example an optical grade acrylic adhesive. The anti-shatter membrane115can be from 0.05 to 0.25 mm, alternatively from 0.1 to 0.2 mm in thickness.

The glass sheet102and/or the transparent window portion104can be compressed to cause the glass to be one or more of strengthened, tempered, and convexed. As described above, the glass sheet is generally planar. However, due to the strengthening process, the glass can become slightly curved (e.g. convexed when placed over a touch screen as disclosed herein). However, because this is a slight effect, the glass sheets102can be considered generally planar for practical purposes herein. For example, the glass sheet102or the transparent window portion104can become convex by applying different amounts of pressure when the glass sheet102and/or the transparent window portion104is compressed. The glass sheet102and/or the transparent window portion104can be convex with respect to the touch screen portion of the portable electronic device when the glass touchscreen protector100is adhered to the portable electronic device. When glass sheet102and/or the transparent window portion104is convexed, the glass sheet102and/or the transparent window portion104can assist in preventing or avoiding the generation of interference fringes (also referred to as Newton Rings, or interference patterns) when the glass touch screen protector100has no force being applied and/or when normal pressure is applied to the transparent window portion104. Unlike most of the prior art touch screen protectors which are in direct physical contact with the touch screen, the glass touch screen protector100does not contact the touch screen portion unless excessive force is applied to the transparent window portion104. As a result, the glass touch screen protector100can assist in preventing or avoiding the generation of interference fringes during normal use.

Illustrated inFIG. 5the glass sheet102can be adhered to a touch screen of a portable electronic device10by means of spacer202. The width of the spacer202can be the same as band106and/or the non-functional band of the portable electronic device. The spacer width is selected to conform to or be within the band so that the spacer does not interfere with the use of the touch screen portion when the protector is adhesively mounted onto the device. When the band106is opaque and when the width of the spacer202substantially corresponds to the width of the band106, the spacer202can be substantially hidden from a direct top view when the glass touchscreen protector100is adhered to a portable electronic device. As noted, some devices may have the entire front face as functional, and so may not have a non-functional band, or a very minimized portion. The width of the spacer202can be provided sufficient to support the touchscreen protector100and space it from the touch screen portion. The band106can be omitted or provided as the same width as the spacer202to hide the spacer202from a direct top view.

The spacer202is provided along the outer perimeter of the glass sheet102, substantially continuously surrounding the transparent window104. Accordingly, there may be small gaps along the length of the spacer but still be considered substantially continuous. The spacer202has sufficient thickness to space the glass sheet102near but not in contact with the touch screen portion of the portable electronic device. The spacer spaces the underside of the glass sheet102(and any layers on its underside) from about 0.01 mm to 0.2 mm from the touch screen portion, and alternatively less than 1.0 mm from the touch screen portion. Further, the distance between the glass sheet and the touch screen portion is small enough to allow a capacitive value on the touch screen portion when touched on the glass sheet.

The thickness of the spacer202varies corresponding to the depth of the chamfered portion55of the portable electronic device10. For example, the spacer202increases in thickness in the direction toward the periphery of the glass sheet102. In this way, the increasing thickness of the spacer toward the periphery of the glass sheet creates an inclining ramped surface with respect to the glass sheet102that matches the corresponding ramped decline of the chamfered portion55of the front face of the device. Accordingly, in some examples, the spacer can have an approximately triangular shape. For example, the shape can be a right-triangle shape with the hypotenuse opposite the outer edge of the glass sheet102.

As shown inFIG. 5, the spacer202can be made up of a plurality of layers210of adhesive which are stacked in a horizontal fashion parallel to the glass sheet102. Any number of layers can be used for example 2, 3, 4, 5, 6, 7, 8, 9, or 10 or more layers can be employed. The plurality of layers210can be arranged to correspond to the declined shaped of the chamfered portion. For example, each of the plurality of layers210can have an exterior end211aligned with the edge of the glass sheet102and an internal end212facing the interior portion of the glass sheet102. For each consecutive layer of adhesive outward from the glass sheet102, the internal end212is shorter than the previous. This can also be described as having widths, where the adhesive closest to the glass sheet102has the broadest width, decreasing in width toward the edge with each increasing layer. In this way, the spacer has the greatest thickness toward the periphery of the glass sheet102, however, when one moves toward the periphery from the interior, more layers contribute to thickness, until each layer contributes to the thickness of the spacer202at the edge of glass sheet102. The internal ends212can form a series of steps which increase in height from the glass sheet102in the direction toward the periphery. The internal ends212can also be made diagonal so as to form a ramp rather than a staircase in the illustration.

The outermost of the plurality of adhesive layers210can be an exposed adhesive. The outer adhesive layer is the exposed adhesive208for contact with a display screen. The exposed adhesive208can be provided along the internal ends212of the plurality of layers to form a continuous ramp surface. The continuous inclined ramp surface can be shaped to correspond to the declined ramp of the chamfered portion55of the front face of the portable electronic device. The exposed adhesive or exposed adhesive layer208can have sufficient adhesiveness to mount the glass touchscreen protector100to a portable electronic device multiple times for repeated removal and re-attachment, and enables the removal of the glass touch screen protector100without leaving adhesive residue on the portable electronic device.

Each of the plurality of adhesive layers210can be from 0.01 to 0.5 mm per layer, alternatively from 0.1 to 0.2 mm, and alternatively about 0.1 mm in thickness. Accordingly, the spacer can be from 0.01 mm in its thinnest portion (e.g., one layer thick), up to about 0.6 mm, or 1.0 mm, or 1.5 mm or more depending on how many layers are used in its thickest portion at the periphery of the glass sheet102. Accordingly, the spacer202can space the glass sheet (and any other layers on its underside) approximately about or less than 1.0 mm from the touch screen. As shown inFIG. 5A, when pressed against the front face of the device the spacer202will fill the gap made by the chamfered portion55, but have a space250between the underside of the glass screen102(and the anti-shatter membrane115) and the touch screen portion of the device.

The plurality of adhesive layers can be made up of any type of adhesive, for example, acrylic adhesive or silicone adhesive. They each can be made up of the same adhesive or different, independent of one another. The first layer of adhesive230adhered directly on the glass sheet102, or indirectly through another non-adhesive layer (such as a paint layer or anti-shatter membrane), can be made up of a stronger adhesive, for example an acrylic adhesive. The remaining plurality of layers210can be made up of the same or different adhesive. In some examples, the remaining plurality of layers210are made up of a silicone adhesive. Accordingly, the strength of the layers should be such that the exposed adhesive208permits repeated removability, while the first layer230remains adhered to the underside of glass sheet102(directly or indirectly). Further, the plurality of layers remains adhered to one another and do not come apart upon removal of the spacer202from a touch screen. Moreover, the plurality of adhesive layers can also have non-adhesive layers spaced therein, such as a plastic layer, for example a PET layer.

As shown inFIG. 5B, the exposed adhesive208can be applied across the surface between the spacers202, including the transparent window portion104. In such cases, the exposed adhesive can adhere the glass sheet102to the touch screen of the device10when placed thereon. Accordingly, in such example, the glass sheet102is not spaced a distance from the touch screen portion but rather adhered to it. Although shown inFIG. 5B, the paint layer110can also be omitted.

An additional example of a spacer is disclosed for example inFIG. 6. In this example, the spacer202is made up of an elastomeric member204and exposed adhesive208. As shown inFIG. 6, the elastomeric member204can be a single unitary piece or structure. The elastomeric member204can be shaped to increase in thickness toward the periphery of the glass sheet. The elastomeric member204can have a ramp shaped incline (with respect the glass sheet102) which corresponds in shape to the decline ramp of the chamfered portion of a portable electronic device10. Accordingly, the spacer202can space the glass sheet (and any other layers on its underside) approximately about or less than 1.0 mm from the touch screen

The elastomeric member204can be made up of a flexible material such as an elastomer. The elastomeric member204can be made up of a synthetic or natural rubber. For example, the spacer202can be made up of polyurethane (PU), ethylene-vinyl acetate (EVA), styrene-butadiene copolymers, or foams. Although in the illustrated embodiment is elastomeric member204is made up of an elastomer, in other embodiments, a rigid material can be used such as a rigid plastic.

InFIG. 6, the spacer202further has a layer of an exposed adhesive208adhered thereon. The exposed adhesive208can form a continuous ramped surface on the elastomeric member204. The exposed adhesive208can have greater adhesiveness to the elastomeric member204than to a touch screen of a portable electronic device. Accordingly, and as described above, the exposed adhesive208has sufficient strength for repeated removal and re-attachment, and enables the removal of the glass touch screen protector100without leaving adhesive residue on the portable electronic device. Alternatively, the elastomer or elastomeric material used as the unitary structure can be made to have tackiness, or stickiness, and adhesive properties. Accordingly, a single unitary structure may be employed for as the elastomeric member, being made of a material with both elastomeric and adhesive properties. In some examples, the adhesive used has elastomeric properties and can have flexibility as well as sufficient structural and mechanical strength to serve as a spacer202and space the glass sheet102from the touch screen of the device.

As shown inFIG. 6A, the exposed adhesive208can be applied across the surface between the spacers202, including the transparent window portion104. In such cases, the exposed adhesive can adhere the glass sheet102to the touch screen of the device10when placed thereon. Accordingly, in such example, the glass sheet102is not spaced a distance from the touch screen portion but rather adhered to it. Although shown inFIG. 6A, the paint layer110can also be omitted.

FIG. 6Ba spacer202is shown which fixes the glass touch screen protector100to the frame102. The spacer202can correspond to and fill the chamfered portion55. The spacer202can be thick enough to space the glass sheet102from the touch screen20.

An additional exemplary glass touch screen protector is shown inFIG. 7. In this example, the thickness of the spacer202still increases toward the periphery of the glass sheet102, however the spacer202is discontinuous or interrupted laterally in the peripheral direction. For example the spacer202can be made of two or more distinct structures which extend around the perimeter of the glass sheet102between the transparent window104and the outer perimeter edge. For instance, as shown inFIG. 7, the spacer is made up of an inner spacer member203and an outer spacer member204separated by a gap205. The outer spacer member204can have a greater thickness than the inner spacer member203. As further shown inFIG. 7, each distinct member making up the spacer202can, independently of one another, be made up of a two or more layers, for example 2, 3, 4, 5, 6, 7, 8, 9, or 10 or more layers. As shown in the example, the inner spacer member203is made up of two layers210a, with the outermost layer serving as the exposed adhesive208a. The outer spacer member204is made up of five layers210with the outermost layer serving as the exposed adhesive208.

Alternatively both members203,204can each be made up of a single unitary piece or single structure, such as an elastomer or other elastomeric, flexible material. The flexible property assists the spacers in accommodating the shape of the chamfered edge. When each member is a single unitary piece, a layer of adhesive can be added as the exposed adhesive. Alternatively, the elastomer or elastomeric material used as the unitary structure can be made to have tackiness, or stickiness, and adhesive properties. Accordingly, a single unitary structure may be employed for each member, being made of a material with both elastomeric and adhesive properties.

As shown inFIG. 7A, the exposed adhesive208bcan be applied across the surface between the spacers202, including the transparent window portion104. In such cases, the exposed adhesive can adhere the glass sheet102to the touch screen of the device10when placed thereon. Accordingly, in such example, the glass sheet102is not spaced a distance from the touch screen portion but rather adhered to it. Although shown inFIG. 7A, the paint layer110can also be omitted.

Referring toFIG. 8, a back view of a glass touch screen protector having a backing member in accordance with an exemplary embodiment is illustrated. As shown, the glass touch screen protector100can further include a backing member302to protect a back side of the touch screen protector100and the exposed adhesive208of the spacer202. The back side of the glass touch screen protector100is the side that is closest to the portable electronic device when the glass touch screen protector100is adhered to the portable electronic device. The backing member302can include a tab304to assist in the removal of the backing member302prior to mounting the glass touch screen protector100onto the portable electronic device. By grasping and pulling on the tab304, the backing member302can be removed completely from the glass touch screen protector100thereby exposing the adhesive208prior to mounting the glass touch screen protector100to the non-functional border of the touch screen portion of the portable electronic device. The backing member302can include surface306which permits adherence of the backing member302to the back side of the glass touch screen protector100as well as easy removal, and can optionally have adhesive thereon. There are various adhesives as described herein that are commercially available and a skilled artisan can select the particular adhesive for the specific application of adhering the backing member302to the back side of the glass touch screen protector100. The adhesiveness of any adhesive on surface306can be weaker than the exposed adhesive208on the spacer202.

Referring toFIG. 9, a method for adhering a glass touch screen protector to a portable electronic device in accordance with an exemplary embodiment is illustrated. The exemplary method500is provided by way of example, as there are a variety of ways to carry out the method. The method500described below can be carried out using the configurations illustrated inFIGS. 1-8by way of example, and various elements of these figures are referenced in explaining exemplary method500. Each block shown inFIG. 9represents one or more processes, methods or subroutines, carried out in the exemplary method500. The exemplary method500can begin at block502.

At block502, the screen of a portable electronic device is cleaned. For example, a user can use a microfiber cloth or other suitable cleaner to wipe away any dust particles on the screen of portable electronic device10. The microfiber cloth can be included in the original packaging or can be an aftermarket microfiber cloth. After cleaning the screen of the portable electronic device10, the method can proceed to block504. At block504, a backing member is peeled off of the glass touch screen protector. For example, the backing member302can be removed to expose the exposed adhesive208protected by the backing member302. After removing the backing member302, the method500can proceed to block506. At block506, the glass touch screen protector is aligned onto the portable electronic device. For example, a user can align the bottom of the glass touch screen protector100at the bottom including aligning any button holes. After aligning the glass touch screen protector100onto the portable electronic device10, the method500can proceed to block508. At block508, pressure is applied around the borders of the glass touch screen protector to mount the glass touch screen protector on the portable electronic device. For example, the user can apply pressure on the glass touch screen protector100, thereby pressing the exposed adhesive208against the portable electronic device10, to mount the glass touch screen protector100onto the portable electronic device10. After the glass touch screen protector100is mounted on the portable electronic device, the glass touch screen protector100can be removed and the method500can be executed again.

To assist in preventing or avoiding the generation of interference fringes during normal use, micro-particles can be applied to the underside of the glass sheet102and/or the transparent window portion104. The micro-particles can be applied to the underside of a glass sheet102and/or the transparent window portion104(or a PET layer on its underside). The underside of the glass sheet102and/or the transparent window portion104is the side that is closest to the portable electronic device when the glass touch screen protector100is mounted on a portable electronic device. The micro-particles can be printed on the underside of the glass sheet102and/or the transparent window portion104. The micro-particles are not in physical contact with the touch screen portion unless the glass touch screen protector100is pressed against the touch screen portion. The micro-particles can provide an anti-static effect and can quickly bounce back or pull away the glass sheet102and/or the transparent window portion104from the touch screen portion once it is no longer pressed against it. The micro-particles on the inner side of glass sheet102can be of various shapes, such as column shaped and/or wave shaped. The density of the micro-particles can be optimized such that they can be dense enough for providing anti-static effects but not too dense as to adversely affect the quality of images that are viewed through the window. A micro-particle covering can be more than 5% of the glass sheet102and/or the transparent window portion104. Alternatively, the micro-particles covering can be more than 8% of the glass sheet102and/or the transparent window portion104. Alternatively, the micro-particles covering can be more than 10% of the glass sheet102and/or the transparent window portion104. If desired, the entire glass sheet102of the protector can be covered with micro-particles, but good results can also be achieved if up to 50% of the entire glass sheet102is covered. The micro-particles can be made of any transparent material commonly known in the art, such as an oleophobic coating. The micro-particles can be made up of PET so that they are compatible with the glass sheet102. In some embodiments, the glass sheet102and/or the transparent window portion104of the glass touch screen protector100can include micro-particles on both sides so that the outer surface of the glass sheet102also does not generate static electricity during use.

The various embodiments described above are provided by way of illustration only and should not be construed to limit the scope of the disclosure. Various modifications and changes can be made to the principles and embodiments described herein without departing from the scope of the disclosure and without departing from the claims which follow.