Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Richard Gioscia Matias Duarte Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires Application number US12/463,145 Other versions US20100171707A1
#TOUCH SCREEN PHONE DAIL KEYPAD LAYOUT PDF#
Google Patents Secondary key group layout for keyboardĭownload PDF Info Publication number US8259075B2 US8259075B2 US12/463,145 US46314509A US8259075B2 US 8259075 B2 US8259075 B2 US 8259075B2 US 46314509 A US46314509 A US 46314509A US 8259075 B2 US8259075 B2 US 8259075B2 Authority US United States Prior art keywords keys keyboard character value grouping key Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US8259075B2 - Secondary key group layout for keyboard Physical keypads offer a higher level of accuracy, but touchscreens may be preferred for their reliability and resistance to dirt.US8259075B2 - Secondary key group layout for keyboard
So, which type of keypad comes out on top? As you can see from above, there are advantages to both touchscreens and physical keypads. Featuring a flexible membrane-like design, all the keys are embedded directly into the surface, meaning there’s no way for dirt or debris to make its way underneath the keys. Note: you can avoid mechanical problems associated with physical keypads by opting for a membrane keypad. This isn’t an issue with touchscreens, however, as keypresses are performed directly on the electronic display. When this occurs, it can either restrict the key from making contact, or it can damage the components. Mechanical keypads may be prone to failure due to dirt and debris becoming stuck underneath the keys. Of course, the greatest advantage that touchscreens have over their mechanical keypad counterpart is greater reliability. Why do touchscreens have a lower accuracy than mechanical keypads? Well, this is because the surface on which you type is completely flat with no distinguishable barriers or other physical characteristics separating the keys. You may attempt to type a sentence, only to accidentally hit several unnecessary keys in the process. Virtual keypads used on touchscreens are often difficult to use. In terms of accuracy, physical keypads trump touchscreens time and time again. Again, it all depends on the circumstances surrounding the work application. But for restaurants and retail stores, touchscreens may prove to be a better choice. If employees are wearing gloves, then a mechanical keypad is the preferred choice, as mechanical keys are easier to use when wearing gloves. There are certain work applications in which touchscreens are best, and there are others in which physical keypads are best. With devices today now featuring physical keypads and touchscreens, however, you might be wondering which type is the best.
But then came touchscreens, introducing users to a new, more interactive, means of data input and communication. They provided a simple yet effective means for the operator to input commands. It wasn’t long ago when physical, mechanical keypads were the de-facto standard in smartphones, computer systems, and human machine interfaces (HMI).
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