Handheld Device Merging Camera and Projector Functions
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Solution Overview
Problem
Small handheld electronic devices, such as PDAs and cell phones, have limited display capabilities due to their size, restricting users' ability to view or share images and videos effectively.
Innovation Solution
Integration of image capture and projection functions in a single handheld device using light emitting diodes (LEDs) and digital light processing (DLP) technology, where a reflective light modulator and image sensor can switch between projection and capture modes, allowing for both functions to be performed within a compact device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a small handheld device is used, then portability is improved, but display capability deteriorates due to limited screen size
Solution Approach 1:
The patent combines the display function with the camera function by using the camera sensor to capture images that are then projected onto a surface, creating a shared optical path that serves both functions within the compact device form factor
Solution Approach 2:
The device integrates multiple functions including camera capture, image projection, and display capabilities into a single handheld unit, allowing the same hardware components to serve multiple purposes and eliminating the need for separate devices
2Area of stationary object
If image projection function is added to handheld device, then display capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the projection system with the camera system by using the camera sensor and existing optical components for both capture and projection functions, reducing the need for separate dedicated projection hardware and thereby limiting the increase in device complexity
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
Enables users to project and share images and videos with small groups, overcoming the limitations of direct-view display size and enhancing usability for presentations and sharing.
Implementation Method 1
A light source (e.g., light emitting diodes (LEDs) or lasers) is provided and projects light beams
Implementation Method 2
The light beams are modulated by a spatial light modulator (SLM) such as a digital micromirror device (DMD)
Implementation Method 3
The CCD image sensor or CMOS image sensor captures incoming light beams and converts the light beams into electrical signals
Data Source
AI summary
Described are handheld devices with combined image capture and image projection functions. One embodiment includes modulating and capturing a light beam along the same optic path. In another embodiment, the optical components are operable to switch between projection and capture modes. In yet another embodiment, the optical components may be formed on the same semiconductor substrate thereby increasing functionality.