Patent Application
20120199457
Not applicable.
Not applicable.
The present disclosure generally relates to electronic mobile devices, and more particularly to key and display structures of electronic mobile devices.
In the design of electronic mobile devices, such as cellular phones and the like, there is an inclination to continuously improve aesthetic qualities. One manner for making such improvements involves designing smaller and/or thinner devices by using smaller and/or thinner components. Another manner for making aesthetic improvements includes using visually and/or tactilely pleasing individual components. One set of visually pleasing components includes an external lens that overlies a display module and defines, in part, one or more adjacent menu keys. This structure provides a smooth appearance with few, if any, breaks or discontinuities on the lens between the display module and the keys and between the keys themselves. As such, the keys appear to be part of a bezel structure that surrounds the display.
The above keys, while aesthetically pleasing, can be difficult for a user to manipulate. For example, if each key includes a mechanical switch (i.e., a dome switch) beneath the lens, the keys can be prone to “falsing”. That is, keys may be inadvertently deflected and actuated when pressing a neighboring key due to the continuous structure of the lens. Slits or breaks can be provided between adjacent keys to prevent adjacent lens portions from unintentionally deflecting, although such a solution reduces the aesthetic appeal of the device.
Another solution to address key falsing involves using a touch-sensitive input device instead of mechanical switches. A touch-sensitive input can readily distinguish key presses between adjacent keys that are defined, in part, by a common lens structure. However, such touch-sensitive inputs typically do not provide tactile feedback to indicate to a user that a key has been successfully pressed.
According to some embodiments, a key/display assembly includes a first switch and a second switch, and a display module is disposed aside the first switch and the second switch. A lens is disposed adjacent the display module and has an inner surface facing the display module. The lens includes a first contact region adjacent the first switch and a second contact region adjacent the second switch. The inner surface supports a first foot disposed between the first contact region and the second contact region. A first key is defined by the first switch and the first contact region such that the first key is actuated by deflecting the first contact region to actuate the first switch. A second key is defined by the second switch and the second contact region such that the second key is actuated by deflecting the second contact region to actuate the second switch. When the first contact region deflects to actuate the first switch, the first foot inhibits the second contact region from actuating the second switch. When the second contact region deflects to actuate the second switch, the first foot inhibits the first contact region from actuating the first switch.
The teachings of the present disclosure relate generally to portable electronic devices, e.g., mobile communication devices such as pagers, cellular phones, global positioning system (GPS) navigation devices and other satellite navigation devices, smart phones, wireless organizers, wireless personal digital assistants (PDA), and tablet computers. The portable electronic devices could be devices without wireless communication capabilities such as PDAs, electronic gaming devices, digital photograph albums or picture frames, digital cameras, or digital video recorders. These examples are intended to be non-limiting. It is also possible that the teachings of the present disclosure could be applied to electronic devices other than handheld electronic devices, e.g., notebook computers.
Referring now to
Above the keypad 104, the front surface of the base 102 supports a menu key/display assembly 108. As the name implies, the key/display assembly 108 is actuatable to perform various tasks (e.g., place and end voice calls, enter and exit device applications, and the like) and displays information to the user. Furthermore, with the exception of an optional input control (e.g., an optical trackpad 110 or the like), the key/display assembly has a generally continuous and aesthetically pleasing external appearance. The following paragraphs describe more specifically the structure of the key/display assembly 108 that provides this pleasing appearance in addition to improved key manipulability.
Still referring to
An open-rectangular gasket 214 (
The key/display assembly 108 further includes a first switch 216A, a second switch 216B, a third switch 216C, and a fourth switch 216D (
Each switch 216A-D defines, in part, a menu key of the key/display assembly 108 that is actuatable to perform one or more tasks. In particular, the first switch 216A defines, in part, a first key 120A (
The key/display assembly 108 further includes a lens 122 that overlies the display module 212, the compressible gasket 214, and the switches 216A-D. The lens 122 protects the components disposed therebelow and inhibits debris and other contaminants from entering the electronic mobile device 100. As such, the lens 122 may comprise molded materials such as polycarbonates, acrylics, thermoplastic elastomers (TPEs), and the like.
The lens 122 includes a first deflectable portion 224A and a second deflectable portion 224B that are cantilevered past the edge of the display module 212 and further define the menu keys 120A-D. In particular, the first deflectable portion 224A includes a first contact region 226A that further defines the first menu key 120A and a second contact region 226B that further defines the second menu key 120B. The second deflectable portion 224B includes a third contact region 226C that further defines the third menu key 120C and a fourth contact region 226D that further defines the fourth menu key 120D. As such, pressing and deflecting the first contact region 226A thereby actuates the first switch 216A to indicate to the microprocessor that the first key 120A has been pressed. Pressing and deflecting the second contact region 226B thereby actuates the second switch 216B to indicate that the second key 120B has been pressed. Pressing and deflecting the third contact region 226C thereby actuates the third switch 216C to indicate that the third key 120C has been pressed. Lastly, pressing and deflecting the fourth contact region 226D thereby actuates the fourth switch 216D to indicate that the fourth key 120D has been pressed.
In addition to protecting the components disposed therebelow and partially defining the menu keys 120A-D, the lens 122 is also generally continuous (i.e., lacking breaks and changes in thickness except for a passageway 228 through which the trackpad 110 extends) to provide an aesthetically pleasing appearance. In particular, the lens 122 is continuous between the first and second contact regions 226A and 226B and between the third and fourth contact regions 226C and 226D. Furthermore, the lens 122 is also continuous between a display region 230 that overlies the display module 212 and the contact regions 226A-D.
From the above, it should be apparent that deflecting one of the contact regions causes deflection of the adjacent contact region due to the continuous lens structure. For example, deflecting the first contact region 226A causes the second contact region 226B to deflect towards the second switch 216B. To prevent such switch falsing, an inner surface 332 (
As shown most clearly in
Regardless of the specific shape that is used, the first foot 234A is disposed between the first contact region 226A and the second contact region 226B. As such, when the user deflects the first contact region 226A to actuate the first switch 216A (i.e., actuates the first key 120A), the first foot 234A contacts the first light guide 218A to inhibit the second contact region 226B from actuating the second switch 216B. Conversely, when the user deflects the second contact region 226B to actuate the second switch 216B, the first foot 234A contacts the first light guide 218A to inhibit the first contact region 226A from actuating the first switch 216A.
In order to provide relatively low initial tactile feedback forces to the device user, the first foot 234A is normally spaced apart from the first light guide 218A by a small distance (e.g., approximately 0.2 mm). As such, the first and second contact regions 226A, 226B are deflectable over a first distance before the first foot 234A contacts the light guide 218A. After the first foot 234A contacts the first light guide 218A, the pressed contact region 226A or 226B may be further pressed and deflected over a second distance (e.g., approximately 0.2 mm) to actuate the associated switch 216A or 216B. However, the unpressed contact region 226A or 226B moves slightly away from the other switch 216A or 216B due to the “see-saw” structure of the first deflectable portion 224A and the first foot 234A. In particular and as shown most clearly in
The second foot 234B is disposed between the third contact region 226C and the fourth contact region 226D but otherwise acts in a similar manner to the first foot 234A. In particular, when the user deflects the third contact region 226C to actuate the third switch 216C (i.e., actuates the third key 120C), the second foot 234B contacts the second light guide 218B to inhibit the fourth contact region 226D from actuating the fourth switch 216D. Conversely, when the user deflects the fourth contact region 226D to actuate the fourth switch 216D, the second foot 234B contacts the second light guide 2188 to inhibit the third contact region 226C from actuating the third switch 216C.
In order to provide relatively low initial tactile feedback forces to the device user, the second foot 234B is normally spaced apart from the second light guide 218B by a small distance (e.g., approximately 0.2 mm). As such, the third and fourth contact regions 226C, 226D are deflectable over a first distance before the second foot 234B contacts the light guide 2188. After the second foot 234B contacts the second light guide 218B, the pressed contact region 226C or 226D may be further pressed and deflected over a second distance (e.g., approximately 0.2 mm) to actuate the associated switch 216C or 216D. However, the unpressed contact region 226C or 226D moves slightly away from the other switch 216C or 216D due to the “see-saw” structure of the second deflectable portion 224B and the second foot 234B. In particular, the fourth contact region 226D moves away from the fourth switch 216D when the third contact region 226C deflects to actuate the third switch 216C. Conversely, the third contact region 226C moves away from the third switch 216C when the fourth contact region 226D deflects to actuate the fourth switch 216D.
In addition to the features described above, the lens 122 further includes in-mold decorative features that identify the menu keys 120A-D. In particular, the in-mold decorative features include invariant indicia (i.e., invariant text characters, such as letters, numbers, punctuation, and symbols, and invariant functional characters, such as shift, enter, delete, menu, back, place call, end call, ‘sym’, and ‘alt’) aligned with the contact regions 226A-D and corresponding to the functions of the menu keys 120A-D. For example, the indicia includes a telephone-shaped functional character aligned with the first contact region 226A and corresponding to the “place call” function of the first key 120A.
As used herein, the term “invariant”, when used to describe indicia, means that the text and/or functional character of a key does not change to other text and functional characters. However, the function performed by pressing such a key may vary depending on the operating mode of the electronic mobile device (e.g., if placing a phone call, sending a text message, playing a game, etc.). Furthermore, invariant indicia may be transparent or translucent and may be illuminated by light directed from the light guides 218A, 218B depending on the operating mode of the electronic mobile device (e.g., upon sensing low-light conditions). In addition, it is noted that the indicia are not limited to “invariant” indicia, but could also include variant indicia that changes based on the application, using such technology as e-ink, for example and as known in the art.
The key/display assembly 108 described above may be modified in various manners without departing from the scope of the disclosure. For example, the embodiments described above do not include a falsing-inhibiting foot between the second and third contact regions 226B, 226C because the trackpad passageway 228 reduces the likelihood of falsing between these contact regions. In other embodiments, the optical trackpad 110 is omitted and a foot is disposed between the second and third contact regions 226B, 226C to inhibit switch falsing (not shown).
From the above description it should be apparent that the present disclosure provides an electronic mobile device that has an aesthetically pleasing external appearance due to a generally continuous protective lens. In addition, the key/display assembly has a structure that inhibits switch falsing while providing tactile feedback to the device user.
The various embodiments presented above are merely examples and are in no way meant to limit the scope of this disclosure. Variations of the embodiments described herein will be apparent to persons of ordinary skill in the art, such variations being within the intended scope of the present application. In particular, features from one or more of the above-described embodiments may be selected to create alternative embodiments comprised of a sub-combination of features which may not be explicitly described above. In addition, features from one or more of the above-described embodiments may be selected and combined to create alternative embodiments comprised of a combination of features which may not be explicitly described above. Features suitable for such combinations and sub-combinations would be readily apparent to persons skilled in the art upon review of the present application as a whole. The subject matter described herein and in the recited claims intends to cover and embrace all suitable changes in technology.
