Trackball Zoom Control for Unobstructed Front Camera
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Solution Overview
Problem
Portable electronic devices with integrated cameras face usability challenges due to the placement of the camera lens and the lack of dedicated buttons for camera functions, leading to obstructed views and non-intuitive use of existing keys for camera controls.
Innovation Solution
A method and apparatus using a trackball as a user-input device to control the display, allowing zooming in and out by rolling the trackball and capturing images, with a processor generating icons to indicate available zoom levels and integrating camera functionality with telephony and instant messaging applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the camera lens is positioned on the rear of the portable electronic device, then the device can capture images, but the user's index finger obscures the camera lens when grasping the device to operate the trackwheel
Solution Approach 1:
The patent repositions the camera lens from the traditional rear position to the front of the device, changing the spatial dimension of camera placement. This allows the user to grasp the device with the thumb on the side for trackwheel operation while the index finger does not obstruct the lens, as the lens is now positioned in a different spatial location that does not conflict with the grasping hand position.
Solution Approach 2:
The side of the device where the trackwheel is located is designed to serve multiple functions: it acts as both the operational surface for trackwheel manipulation and a non-obstructive zone for camera lens placement. This multi-functional design allows the same physical space to support both input device operation and camera functionality without interference.
2Ease of operation
If dedicated physical buttons are added for camera functions (zoom, flash), then camera control is simplified, but the device complexity increases and portability is compromised
Solution Approach 1:
The existing trackwheel, originally designed for navigation in PDA and telephone functions, is assigned additional camera control functions. By rolling the trackwheel in different directions or pressing it, users can control zoom, flash, and other camera functions, allowing one input device to serve multiple purposes without adding dedicated buttons for each function.
Solution Approach 2:
The patent merges the navigation control functions and camera control functions into a single trackwheel input device. The trackwheel combines scrolling for menu navigation with rotational input for zoom control and pressing for shutter/flash activation, consolidating what would traditionally require separate buttons into one unified control mechanism.
3Device complexity
If existing keys are used for camera functions, then device complexity is maintained, but the control scheme becomes non-intuitive for users
Solution Approach 1:
The trackwheel is assigned specific directional meanings for different functions: rolling in one direction controls zoom, rolling in the opposite direction controls flash, and pressing activates the shutter. This local differentiation of control modes within the same physical device makes the control scheme intuitive, as each direction or action has a dedicated, predictable function rather than requiring users to memorize arbitrary key assignments.
Data Source
AI summary
A novel method and apparatus for controlling a display of an electronic device is provided. In an embodiment, the device is a portable electronic device with the combined features of wireless email and telephony. The portable electronic device also includes a camera. The device includes a trackball which can be used to control the image shown in the viewfinder when the device is being used as a camera.