Light-Emitting Pen for Projection Display Attribute Switching
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Solution Overview
Problem
Conventional projection-type image display devices require complex operations and high costs to switch attributes like color and thickness of drawn lines or figures, with methods involving software pallets or multiple pens, lacking flexibility.
Innovation Solution
An image display system with a projection-type image display device and a light-emitting pen that recognizes non-visible light patterns emitted by the pen, allowing for flexible switching of attributes like color and thickness based on the pattern recognized by the device's sensor, eliminating the need for multiple pens or software-based switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pen with software-based attribute switching is used, then the device complexity is reduced, but the ease of operation deteriorates due to complicated switching operations
Solution Approach 1:
The patent applies color changes by using different visible light wavelengths (colors) emitted from the pen to represent different attributes. The projection-type image display device detects the color of light emitted by the pen and automatically switches attributes such as line color, thickness, or drawing mode based on the detected wavelength, eliminating the need for manual software-based attribute switching operations.
2Ease of operation
If multiple pens with different attributes are prepared, then the ease of operation improves, but the device complexity and cost increase
Solution Approach 1:
The patent applies universality by making a single pen capable of representing multiple attributes through different visible light wavelengths. Instead of requiring multiple specialized pens for different attributes, one universal pen can switch between various functions (different line colors, thicknesses, drawing modes) by emitting light at different wavelengths, which the projection-type image display device detects and interprets as attribute selection commands.
3Adaptability or versatility
If multiple pens with different attributes are prepared, then the adaptability improves, but the manufacturing cost increases
Solution Approach 1:
The patent applies universality by making a single pen capable of representing multiple attributes through different visible light wavelengths. Instead of requiring multiple specialized pens for different attributes, one universal pen can switch between various functions (different line colors, thicknesses, drawing modes) by emitting light at different wavelengths, which the projection-type image display device detects and interprets as attribute selection commands.
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 flexible and cost-effective switching of attributes in real-time, reducing operational complexity and the need for multiple pens, enhancing user interaction with the system.
Implementation Method 1
image data captured by a sensor performing image-capturing based on reflection light of the non-visible light with the predetermined wavelength reflected on the screen
Data Source
AI summary
In an image display system including a pen and a projection-type image display device having an interactive function, attributes such as a color and a thickness of a line or a figure to be drawn can be more flexibly switched at a lower cost. According to a typical embodiment, a pen-shaped pointing tool has a light emitting portion which emits non-visible light with a predetermined wavelength. The projection-type image display device has an interactive function unit which, from image data captured by a sensor performing image-capturing based on reflection light of the non-visible light with the predetermined wavelength reflected on the screen, recognizes a position of and a content of a light emitting pattern emitted from the pointing tool onto the screen, and executes process contents which are different from one another, based on the recognized position of and content of the light emitting pattern.