Compact Input Apparatus for Handheld Devices
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Solution Overview
Problem
Handheld electronic devices face challenges in compacting their input apparatus, such as keyboards, due to physical size limitations of key switches, leading to user unfriendliness and awkward usage, especially when multiple keys need to be actuated simultaneously.
Innovation Solution
The input apparatus features a movable input assembly with actuating elements and cam portions that allow for a compact key layout by sharing a single actuating element among multiple keys, reducing the need for separate dome switches and enabling precise tactile feedback only for the actuated key, thus minimizing user confusion and allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate dome switches are used for each key, then each key can provide independent tactile feedback, but the physical size of the switches limits how closely keys can be configured
Solution Approach 1:
Multiple independent dome switches are merged into a single shared actuating element that can be actuated by multiple input members (keys). This consolidation reduces the total component count and allows keys to be positioned closer together while maintaining tactile feedback through the shared element's actuation.
Solution Approach 2:
The single actuating element serves multiple functions by being capable of actuation from different directions or positions corresponding to multiple keys. This multi-functional design allows one component to replace what would traditionally require multiple separate switches, enabling compact keyboard layouts.
2Adaptability or versatility
If multiple keys are actuated simultaneously with separate dome switches, then multiple functions can be input, but multiple domes collapse producing confusing tactile feedback
Solution Approach 1:
Multiple keys share a single actuating element, so when multiple keys are pressed simultaneously, only one physical actuation event occurs. This eliminates the confusing sensation of multiple domes collapsing while still registering multiple key combinations through the shared element's position or state.
Solution Approach 2:
The shared actuating element acts as an intermediary between multiple input members and the input device. It mediates the actuation signals from multiple keys, converting them into a single unified input event that the processor can interpret as a key combination, thereby simplifying the tactile feedback experience.
3Area of stationary object
If the keyboard is reduced in size to fit smaller handheld devices, then portability is improved, but the spacing between keys must be reduced which is inhibited by existing switch technology
Solution Approach 1:
By merging multiple key actuation functions into a single actuating element, the physical space required for each key's switch mechanism is dramatically reduced. This allows keys to be positioned much closer together than traditional switch technology would permit, enabling compact keyboard layouts in small handheld devices.
Solution Approach 2:
The invention transitions from a traditional vertical compression approach (reducing key size) to a horizontal integration approach (sharing actuating elements across multiple keys). This dimensional shift in the organizational structure of the input apparatus enables compact layouts without compromising key spacing or usability.
4Adaptability or versatility
If technology is used to reduce the number of keys, then versatility is increased, but numerous keys must be actuated simultaneously which makes the device awkward to use
Solution Approach 1:
The shared actuating element provides universal actuation capability for multiple keys, allowing the device to maintain high versatility with fewer physical keys. The element can respond to actuation from any of the associated input members, enabling complex functionality to be accessed through a simplified interface that doesn't require simultaneous multi-key pressing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables a compact and user-friendly input interface for handheld devices by reducing the spacing between keys and providing clear tactile feedback, enhancing usability while maintaining the functionality of a traditional key layout like QWERTY, even in reduced device sizes.
Implementation Method 1
Each input member may include a cam portion, and the actuating element may include a number of reaction portions wherein each cam portion of an input member in the actuated position is engageable with a corresponding reaction portion to move the actuating element toward the second position
Data Source
AI summary
An improved input apparatus and method of enabling input improve handheld electronic devices having a housing and a processor apparatus disposed on the housing. The processor apparatus comprises a processor and a memory. The input apparatus includes an input assembly with an input device for providing input to the processor, a plurality of input members, and at least a first actuating element movable between a first position and a second position. In the second position, the actuating element actuates the input device. Each input member of the portion of input members is movable among an unactuated position and an actuated position. Each of a plurality of input members of the portion of input members, in the actuated position, is engageable with the actuating element to move it toward the second position. The input apparatus enables close arrangement of the input members to provide, for example, a compact keyboard layout.