Dynamic Mode Selector Bezel
Original Publication Date: 2004-May-03
Included in the Prior Art Database: 2004-May-03
Steven Tan: AUTHOR [+3]
AbstractThe dynamic mode selector bezel relates to handphones or portable two-way radios having a rotatable bezel which serves as a lens protector as well as a mode selector. Mode or profile selection is made available through the various slots on the slotted ring which the rotatable bezel rests upon.
Mode Selector Bezel
Steven Tan, Ooi Joo Guan and Tan Pek Kai
The dynamic mode selector bezel relates to handphones or portable two-way radios having a rotatable bezel which serves as a lens protector as well as a mode selector. Mode or profile selection is made available through the various slots on the slotted ring which the rotatable bezel rests upon.
CURRENT MODE SELECTION OPTIONS
Current radio designs allow users to scroll through various menus or sub-menus through navigation using the built-in keypads of the radios. This method, although functional, involves numerous key presses on the user’s part in order to select the mode that he/she desires. For faster access to functions, minimal effort is a desirable quality in a radio. Examples of situations that warrant such ability are:
i) Switching into silence mode of operation at a press of a button when entering a quiet place.
ii) Repeated toggling between different functions while navigating and operating a moving vehicle in search of geographical location.
iii) Reduced power-consumption in remote areas when battery life is low with minimal accessing to stored data.
iv) Many other unforeseen circumstances where rapid accessing is a critical priority.
DYNAMIC MODE SELECTOR BEZEL
The purpose of the mode selector bezel is to incorporate mode/menu selection onto a bezel. The bezel (Fig. 1) doubles up as a mechanical fortification against damage caused by physical impact, a departure from conventional protection offered by plastic lens over delicate LCD screens and other internal components.
Fig. 1 Rotating Bezel
The ‘dynamic channel selector’ (movable bezel) is built with impact resistance material and profiled prominently for ease of handling by the thumb while the other fingers wrap snugly around the radio. When operating, the bezel slides effortlessly above a slotted inner ring (Fig. 2) that has matching profile to the former. The bezel can be rotated clockwise or anti-clockwise whereas the inner ring remains stationary. The core of the inner ring is inlaid with two incomplete circular strips of conductive elements (Fig. 3).
Fig. 2 Slotted Inner Ring
These elements are made of Carbon and Metal and set into their respective positions with a constant spacing between them. These two lines provide a high (+5V) line and a sense line. The high line (carbon) will be made resistive, with its distance from the feed-point to be directly proportional to its resistive value:
R = kL
Fig. 3 Carbon and Metal Rings of the Inner Core
Whenever the spring-activated terminal (Fig. 4), which is affixed to the bezel, touches exposed elements at any of the slots on the inner ring, a close circuit is formed between the carbon ring (positive potential) and the metal ring (ground) of the inner core through the metallic spring contact which is affixed to the be...