Human Interface Devices Pt. 1
Hello everyone, today I have an excerpt for you on human interface devices from Silicon Labs.
and I quote:
“
The phrase “human interface” has long been part of the technology industry lexicon. With advances in touch sensors, proximity sensors, ambient light sensors, and accelerometers, the ability and sophistication of devices used for inputs have dramatically changed. Figure 1 shows how a simplified human interface process flow can be envisioned.
Fig. 1. Simplified human interface process flow.
Each of the input events is tied to a specific threshold level that must be met to trigger one or more output events. Similarly, each output event is tied to one or more subsystems that will be affected.
For example, a handset device may be kept in a sleep-mode for power-saving reasons. However, upon the detection of a touch that exceeds a certain pressure threshold, the handset will turn on the screen, provide an auditory confirmation over a speaker and turn off the screen locking feature. A single input event has been tied to three different output events affecting two different subsystems.
The good news for designers is that innovation has dramatically improved the ability of a device to offer a wide variety of creative input and output choices that can add a significant amount of appeal to an end product. However, this rapidly improving capability comes at a price: design complexity. From an implementation perspective, what is really needed is the ability to create an interconnected framework that enables a tight coupling of these input/output interactions while still leaving flexibility to adjust for ever-changing market requirements…”
Borrowed 2/26/10 from http://www2.electronicproducts.com/The_continuing_evolution_of_the_human_interface-article-FAJH_SiLabs_Feb2010-html.aspx
Keep tuned in for tomorrows excerpt!!
-JD
Author: Juan | Date: February 26, 2010 - 04:55 PM
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