Patent Application
20130020005
Within the field of electronics, many scenarios involve a portable device, such as a mobile phone, a tablet, a media player, a global positioning service (GPS) receiver, and a personal data assistant. Such devices may feature a device surface (e.g., a screen, a touchpad, or a camera lens) that may be susceptible to various types of damage upon exposure to pressure, scratches, sunlight, water, or chemicals. Even surfaces of the device that are primarily structural (e.g., a bezel of a screen or a back of the device) may be susceptible to cosmetic damage, such as scratches that may disrupt a smooth finish of the surface.
In order to protect such device surfaces, protective films have been devised that may be overlaid upon the device surface to reduce damage from various sources. For example, the film may be transparent and semi-transparent to visible light (e.g., passing most or all of the light emitted by a backlit screen) and may permit some other forms of input and output (e.g., films that present a compatibility with capacitative touchscreens by not obscuring the effects of skin contact), but may filter out ultraviolet light that may damage the screen; may absorb shocks and scratches; and may provide resistance for incidental exposure to water. Such films are often provided with an adhesive that enables adherence of the film to the device surface, and may be fabricated from inexpensive materials that enable easy replacement (e.g., if the film becomes discolored or scratched, or if the adhesive adhering the film to the device surface loses strength).
This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key factors or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
A problem that may often arise while applying and using a protective film is the proper alignment of the film with respect to the device surface. As a first example, a film may attach to the device surface with a static adhesive, such that once attached to the device surface, the film tightly adheres and cannot be easily repositioned. However, it may be very difficult for a user to choose a precise and accurate alignment of the film with the device surface upon first contact, and attempting to realign the film may involve breaking the static adhesive, resulting in a weaker final adhesion of the film to the device surface. As a second example, a film may attach to a device surface with a dynamic adhesive that is initially movable, and that gradually activates to provide stronger adherence and resist relocation (e.g., an adhesive fluid that provides little adherence upon application of the film, but that gradually dries into an activated adhesive that tightly adheres the film to the selected alignment of the device surface). However, the application of a film coated with fluid adhesive to a device surface often traps air bubbles that reduce the cosmetic quality of the device and that impair the functionality of the device surface (e.g., by presenting irregularities in the display presented by a screen, or by reducing the consistent sensitivity of a touchpad). Moreover, while a fluid adhesive may enable the user to reposition the film, the repositioning process may be frustrating to the user, and the manual involvement of the user may lead to a diminished final result (e.g., a lateral misalignment of the film that results in a difference between the width of the film at the left edge of the device surface and the width of the film at the right edge of the device surface).
Presented herein are techniques for promoting the alignment of a film with a device surface. These techniques involve an applicator comprising at least one anchor that is conformant with at least one surface projection of a device surface, such as an aperture (e.g., a headphones port) or a protrusion (e.g., a raised button, switch, or antenna). For example, the anchor may comprise a protrusion that is shaped and positioned on the applicator to couple with a headphones port or a data port of the device, or an aperture that is shaped and positioned on the applicator to couple with a raised button or switch of the device. The applicator is also coupled with the film in such a manner that when the anchor of the applicator is coupled with the surface projection of the device surface, the film is accurately aligned with the device surface. The surface of the film oriented toward the device screen is coated with a surface adhesive that tightly adheres to the device surface. Having been aligned with and adhering to the device surface, the film may be decoupled from the applicator (e.g., by peeling the applicator away from the film and device surface, thereby breaking a weak applicator adhesive coupling the applicator with the film). Moreover, if the surface adhesive comprises a fluid that is initially deactivated, the applicator may include a squeegee guide, which, when coupled with a squeegee, may guide the squeegee over the film, thereby promoting removal of air bubbles trapped by the fluid adhesive. In this manner, the techniques presented herein may be used to align the film with the device surface in an accurate manner with little or no manual positioning by the user, and may assist in the removal of air bubbles trapped in the surface adhesive.
To the accomplishment of the foregoing and related ends, the following description and annexed drawings set forth certain illustrative aspects and implementations. These are indicative of but a few of the various ways in which one or more aspects may be employed. Other aspects, advantages, and novel features of the disclosure will become apparent from the following detailed description when considered in conjunction with the annexed drawings.
The claimed subject matter is now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the claimed subject matter. It may be evident, however, that the claimed subject matter may be practiced without these specific details. In other instances, structures and devices are shown in block diagram form in order to facilitate describing the claimed subject matter.
Within the field of electronics, many scenarios involve a device having a device surface. The range of such devices includes communications devices, such as mobile phones and text messaging devices; tablet- and palm-factor computers; personal data assistants; cameras; portable media players, such as music players, video players, and gaming devices; and global positioning system (GPS) receivers. These and other portable devices may be equipped with various types of device surfaces, such as a display; user input devices, such as touchscreens, touchpads, and keypads; media input devices, such as still image cameras, video cameras, and microphones; sensors, such as temperature sensors, light meters, and antennae; and structural surfaces, such as a bezel surrounding a display, a handpiece providing a surface to grip or hold the device, and a case or shield.
These types of portable devices may be exposed to many forces, including physical forces such as scratches, pressure, puncture, and physical shock; excessive heat or light, including ultraviolet light; and chemicals, such as water and spilled drinks. Such forces may cause various types of damage the device surfaces, including cosmetic damage (e.g., a marred finish of the device surface), structural (e.g., cracks), and functional (e.g., damaged input or output devices). Therefore, it may be desirable to protect against damage to the device surfaces, particularly with a comparatively inexpensive and replaceable element that may absorb damage to the surface of a comparatively expensive and irreplaceable device. Many such elements are devised as a transparent or semi-transparent film that may be overlaid upon part or all of the device surface, adhering to the device surface with a type of adhesive. For example, the film may be selected from a polymer that passes through most or all visible light (e.g., light generated from a backlit display), and that blocks ultraviolet light that may discolor the device surface (e.g., in the event of prolonged exposure to sunlight). Alternatively or additionally, the polymer may deflect or absorb forces, such as scratches from physical objects, and/or exposure to chemicals such as water. Many types of films may be utilized to reduce many types of damage to the device surfaces of various types of devices.
However, additional disadvantages may arise in the exemplary scenario 200 of
A third technique for applying a film 106 to a device surface 104 (not shown) involves a “self-wetting” adhesive, comprising a layer of adhesive applied between the film 106 and the device surface 104 that is more viscous than a liquid adhesive, but that is somewhat more dynamic than a tacky adhesive. The film 106 may be positioned and aligned on the device surface 104 while the “self-wetting” adhesive is in a moderately fluid and deactivated state, and some bubbles may be extruded from the surface adhesive 202 (e.g., through the use of a squeegee), before the surface adhesive 202 dries and activates to adhere the film 106 tightly to the device surface 104. Additionally, the moderately fluid nature of the “self-wetting” surface adhesive 202 may enable some air bubbles 204 trapped between the film 106 and the device surface 104 to escape through the semi-porous medium of the film 106. However, “self-wetting” surface adhesives 202 may present additional problems. As a first example, many air bubbles 204 may remain trapped within the surface adhesive 202 between the film 106 and the device surface 104. As a second example, it may be more difficult to squeegee air bubbles 204 out of the surface adhesive 202, due to the greater viscosity as compared with a liquid surface adhesive 202. As a third example, the greater viscosity and tackiness of a “self-wetting” surface adhesive 202, as compared with a liquid surface adhesive 202, may trap lint, dust, or other particles between the film 106 and the device surface 104. Such particles create additional difficulties using a squeegee 206 to remove air bubbles 204 out of the surface adhesive 202; e.g., large air bubbles 204 may pool around the trapped particle that are difficult to dislodge, and that do not completely escape through the film 106.
In view of these and other disadvantages, it may be desirable to apply the film 106 to the device surface 104 of the device 102 in a manner that reduces manual manipulation of the film 106. For example, it may be advantageous to devise a method of initially applying the film 106 in a manner that is accurately and precisely aligned with the device surface 104, and that does not necessarily rely upon the visual acuity, manual dexterity, and judgment of the user 110. The reduction in realignment of the film 106 may result in improved adhesion (due to reduced reformation of the adhesive bonds of the surface adhesive 202, or even the ability to use a more static adhesive), reduced frustration and contamination, and fewer air bubbles 204 resulting in reduced application of a squeegee 206 or other air bubble removal techniques.
Presented herein are techniques for achieving the application of the film 106 to the device surface 104. In accordance with these techniques, it may be observed that many device surfaces 104 include one or more surface projections that interrupt the smooth device surface 104, such as apertures (e.g., a headphones port, a power or data port, or a recessed microphone) and protrusions (e.g., a convex button or switch, an extendable antenna, or a bezel surrounding a screen). In accordance with these techniques, an applicator may be fabricated comprising at least one anchor that is conformable with a surface projection of the device surface 104 of the device 102. For example, the applicator may include an anchor comprising a plug that may be inserted into a headphones port of the device 102. This anchoring may align the applicator to the device surface 104 with high accuracy and precision. Moreover, a film 106 may be coupled with the applicator (e.g., through a weak applicator adhesive) in such a manner that when the applicator is coupled with the device 102, the film 106 is also accurately and precisely aligned with respect to the device surface 104. Thus, the adhesion of the film 106 to the device surface 104, followed by removal of the applicator (e.g., by breaking the weak applicator adhesive coupling the applicator with the film 106), may result in an accurate alignment of the film 106 with the device surface 104 with reduced or no manual manipulation by the user 110.
The techniques discussed herein may be devised with variations in many aspects, and some variations may present additional advantages and/or reduce disadvantages with respect to other variations of these and other techniques. Moreover, some variations may be implemented in combination, and some combinations may feature additional advantages and/or reduced disadvantages through synergistic cooperation. The variations may be incorporated in various embodiments (e.g., the exemplary system of
D1. Materials
A first aspect that may vary among embodiments of these techniques relates to the types of materials that may be used for various elements of such techniques. As a first such variation, many materials may be utilized as a film 106, including forms of urethane, polyurethane, polyester, polyethylene, and ethylene copolymers (e.g., Surlyn® packaging resin). Different materials may confer different degrees of properties that may be relevant in use as a protective film 106 for a device surface 104, such as plasticity (e.g., more rigid materials may provided improved deformation resistance, while more plastic materials may conform better to curved device surfaces 104); transparency (e.g., some materials may provide advantageous degrees of transmission, absorption, or reflection of different wavelengths of light, conferring properties such as high transparency, blocking sunlight, and high or low reflectivity); permeability of oxygen (smaller air bubbles 204 may permeate through the film 106); sensitivity to touch and other stimuli (e.g., compatibility with capacitative touch screens); resistance to scratches, pressure, and water damage; manufacturing cost; and recyclability.
As a second variation of this first aspect, different types of materials may be used for the applicator 302. For example, it may be advantageous to choose an inexpensive and recyclable material for applicators 302 that are likely disposed after use. Conversely, it may be advantageous to choose a durable material for applicators 302 that may be frequently re-used. As another example, it may be desirable to choose a material for the applicator 302 providing malleability that promotes molding into a desired shape (e.g., easy fabrication of the anchor 304); rigidity that resists deformation to retain precise coupling of the anchor 304 with the surface projection 306 and the resulting alignment of the film 106 with the device surface 104; and/or deformability that may enable an anchor 304 to conform to a range of surface projections 306. Additionally, different manufacturing techniques may be utilized to manufacture the applicator 302, such as a thermoforming process, wherein a plastic sheet is heated to induce pliability, molded and trimmed to form a desired shape, and cooled to set a durable form for the applicator 302.
As a third variation of this first aspect, many types of materials may be selected for the surface adhesive 202 that adheres the film 106 to the device surface 104, and/or for the applicator adhesive 308 that couples the film 106 with the applicator 302. Such adhesives may include static adhesives (e.g., persistently tacky adhesives) or dynamic adhesives (e.g., adhesives that are initially “deactivated,” but that may be “activated” through the passage of time, exposure to air or heat, or the addition of other chemicals). Different materials may also provide variations in properties that may be relevant to use as adhesives, such as adhesive strength (e.g., it may be desirable to choose a surface adhesive 202 that is sufficiently tight to resist unintentional removal, but that is sufficiently weak to enable intentional removal); cohesiveness (e.g., fluids may enable repositioning of the film 106); transparency (e.g., some materials may change transparency and color over time or in different conditions, such as heat or humidity); resistance to water and other chemicals; and health effects of exposure.
As a fourth variation of this first aspect, many techniques may be utilized to couple the applicator 302 with the film 106. As a first such example, the applicator 302 may be configured to hold a portion of the film 106, such as a clamp or slot into which an edge of the film may be inserted. As a second such example, the film 106 may be coupled with the applicator 302 through a coupling element, such a fastener that may be removed or broken away to decouple the applicator 302 from the film 106, or a piece of tape that may be peeled away to decouple the applicator 302 from the film 106. As a third example, a weak applicator adhesive 308 may couple the applicator 302 with the film 106. When the film 106 is coupled with the device surface 104, the applicator 302 may be pulled away from the film 106 and the device surface 104. If the applicator adhesive 308 is weaker than the surface adhesive 108, the pulling away may cause the applicator adhesive 308 to break before the surface adhesive 108.
As a fifth variation of this first aspect, the applicator 302 and film 106 may be coupled in various ways and at various times. As a first such example, the applicator 302 may be delivered to a user 110 with the film 106 pre-attached. Alternatively, the applicator 302 may include instructions guiding the user 110 to couple the film 106 with the applicator 302 in an aligned manner. In one such embodiment, the film 106 may comprise a cutout that corresponds to an anchor 304 of the applicator 302, such that when the film 106 is coupled with the anchor 304 of the applicator 302 and the anchor 304 is coupled with the surface projection 306 of the device surface 104, the film 106 is accurately aligned with the device surface 104. Those of ordinary skill in the art may identify many materials and many properties thereof that may be relevant for use in elements of the techniques presented herein.
D2. Applicator and Film Features
A second aspect that may vary among embodiments of these techniques relates to additional features that may be included with an applicator 302 and/or film 106. As a first such variation, the components of these techniques may include a set of instructions, such as a user instruction text (comprising text, symbols, icons, drawings, pictograms, and/or pictures) that may assist a user 110 in applying the film 106 to the device surface 104 through the use of the applicator 302. In one such embodiment, the user instruction text may be imprinted on the applicator 302.
As a second variation of this second aspect, additional elements may be included that alter the rigidity of the film 106. It may be appreciated that many films 106 are flexible, and that such flexibility may be problematic during the application of the film 106; e.g., the film 106 may bend, fold, or crease in undesirable ways during application to the device surface 104, which may cause the film 106 to adhere to itself; trap air, dust, or debris; cause deformation of the film 106, such as persistent creases or other inconsistencies in the film 106; and/or require delicate manipulation to correct, possibly resulting in fingerprints in the surface adhesive 108. Accordingly, it may be desirable to reduce the flexibility of the film 106 during the application of the film 106 to the device surface 104 of the device 102, and, moreover, to do so in a manner that may be reversed after such application. One such embodiment may include a stiffening element that is detachably coupled with the applicator surface 402 of the film 106 (e.g., a piece of cardboard of the shape of the film 106, coupled with the applicator surface 402 of the film 106 using a piece of tape or a weak adhesive) that may reduce the flexibility of the film 106 (e.g., causing the film 106 to retain a rigid, flat shape), and that may be removed after the film 106 is coupled with the device surface 104 of the device 102.
As a third variation of this second aspect, in addition to one or more anchors 304 that conform with one or more surface projections 306 of the device surface 104, an applicator 302 may include other features that assist with the alignment of the applicator 302 with the device surface 104, and, consequently, improve the alignment of the film 106 with the device surface 104. For example, the applicator 302 may include one or more lateral edges that conform with one or more device edge of the device 102, thereby providing another point of registration of the applicator 302 with the device 102 and device surface 104. Such registration features may also include optical guides (e.g., a portion of the applicator 302 that visually couples with a portion of the device 102 when the applicator 302 is correctly aligned with the device surface 104).
As a fourth variation of this second aspect, in addition to being sized according to the device surface 104, the film 106 may also be customized for the device surface 104 in other ways. As a first such example, the film 106 may be shaped to conform to a curve of the device surface 104. As a second such example, the film 106 may be manufactured with variable thickness corresponding to different areas of the device surface 104 (e.g., a thinner portion of the film 106 that overlays a touchscreen portion of the device surface 104). As a third example, the film 106 may feature one or more cutouts that are positioned and sized to, when the film 106 is aligned with the device surface 104, expose one or more device surface features of the device surface 104 (e.g., a cutout exposing an embedded microphone).
As a fifth variation of this second aspect, the surface adhesive 202 of the film 106 may be included as a separate component, e.g., a small vial or packet of adhesive that the user 110 may apply to the film surface 404 of the film 106 prior to application to the device surface 104. Alternatively, the surface adhesive 202 may be applied to the film 106 prior to provision to the user 110, but may be provided in a deactivated state, and may be activated prior to application to the device surface 104 (e.g., a dry adhesive coating the film surface 404 of the film 106 that is non-tacky when dehydrated, but that may be activated through the addition of water). As another alternative, the surface adhesive 202 may be provided to the user 110 with the film 106 in an activated state (e.g., a static adhesive), and may be protected from exposure prior to application to the device surface 104. For example, the film 106 may be provided to the user 110 with a surface adhesive protective film, which may be attached to the film surface 404 of the film 106 to protect the surface adhesive 202, and that, when separated from the film surface 404, exposes the surface adhesive 202 in an activated state. The surface adhesive protective film may be detached by peeling away from the film 106, and/or may include a surface adhesive protective film separation element that enables separation of the surface adhesive protective film from the film surface 404 of the film 102 (e.g., an overlapping tab of the protective film that the user 110 may grasp to peel away the protective film).
As a sixth variation of this second aspect, the film 106 may feature a film lifting element that enables a user 110 to lift a portion of the film 106 away from the device surface 104 while the surface adhesive 202 is in a deactivated state. For example, the film 106 may include a tab that the user 110 may grasp to lift a portion of the film 106, e.g., while repositioning the film 106 on the device surface 104. Moreover, the film lifting element may be detachable, e.g., a separate element that is coupled with the film 106 with a weak adhesive, or an separable element having a perforation that may be torn away from the film 106 or a line visually indicating a cut point to separate the film lifting element from the film 106. Those of ordinary skill in the art may devise many such additional features of the applicator 302 and film 106 that may be compatible with the techniques presented herein.
D3. Air Bubble Removal Features
A third aspect that may vary among embodiments of these techniques relates to the inclusion of features to facilitate the removal of air bubbles 204 that may become trapped in a fluid surface adhesive 202 between the device surface 104 and the film surface 404 of the film 106. As a first such variation, a material may be selected for the film 106 that features an oxygen permeability, whereby small air bubbles 204 may permeate through the film 106 to escape the surface adhesive 202. As a second such variation, the inclusion with the film 106 of a film lifting element may promote the removal of air bubbles 204, e.g., by enabling an incremental application of the film 106 to the device surface 104, and/or a removal and re-application of a portion of the film 106 trapping a large number of air bubbles 204.
As a third variation of this third aspect, the techniques presented herein may include a squeegee having a squeegee edge that, when pushed across an applicator surface 402 of the film 106 toward a film edge, pushes air bubbles trapped under the film 106 toward the film edge of the film 106. The use of the squeegee may be facilitated, e.g., through the inclusion of film lifting element, which may enable the user 110 to squeegee air bubbles 204 out of a first portion of the film 106 (lifting the film 106 away from the device surface 104 up to the film edge of the first portion) before applying a second portion of the film 106 to the device surface 104. The squeegee may be separately included in the techniques presented herein, and/or may be detachably coupled with the applicator 302 (e.g., manufactured with the applicator 302 with a perforated edge that may be broken apart to provide the squeegee to the user 110).
As a fourth variation of this third aspect, elements may be included to facilitate the removal of air bubbles 204 through the use of a squeegee 206. Some such embodiments may include one or more squeegee guides, which may guide the application of the squeegee 206 across the applicator surface 402 of the film 106, e.g., confining the area of the squeegeeing to the device surface 104 (and may block the inadvertent application of the squeegee 206 to other portions of the device 102 that are not protected by the film 106). This may be desirable, e.g., for reducing the unintended application of force to areas of the device 102 peripheral to the device surface 104 that may be marred by such force. The squeegee guides may be included in a separate element, or may be fabricated as part of the applicator 302 or film 106. Alternatively or additionally, the squeegee guide(s) may couple with one or more squeegee guide anchors on the squeegee 206 that may restrict the motion of the squeegee 206. As one such example, the applicator 302 may include a cup that couples with a knob of the squeegee 206 to allow rotation of the squeegee 206 across the device surface 104.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
The claimed subject matter may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques to produce software, firmware, hardware, or any combination thereof to control a computer to implement the disclosed subject matter. The term “article of manufacture” as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. Of course, those skilled in the art will recognize many modifications may be made to this configuration without departing from the scope or spirit of the claimed subject matter.
Various operations of embodiments are provided herein. In one embodiment, one or more of the operations described may constitute computer readable instructions stored on one or more computer readable media, which if executed by a computing device, will cause the computing device to perform the operations described. The order in which some or all of the operations are described should not be construed as to imply that these operations are necessarily order dependent. Alternative ordering will be appreciated by one skilled in the art having the benefit of this description. Further, it will be understood that not all operations are necessarily present in each embodiment provided herein.
Moreover, the word “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous over other aspects or designs. Rather, use of the word exemplary is intended to present concepts in a concrete fashion. As used in this application, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise, or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. In addition, the articles “a” and “an” as used in this application and the appended claims may generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form.
Also, although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the disclosure. In addition, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular application. Furthermore, to the extent that the terms “includes”, “having”, “has”, “with”, or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term “comprising.”
