Fluorescent Screen Laser Display Architecture
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Solution Overview
Problem
Conventional display technologies, such as CRTs, face limitations due to the use of cathode-ray tubes, leading to a decline in demand, and existing display systems either rely on optical lens systems for image projection or have larger form factors due to the need for color pixel formation.
Innovation Solution
The development of display systems utilizing screens with fluorescent materials that absorb optical excitation beams, such as laser beams, to emit colored light, allowing for compact designs and efficient image formation without the need for optical lens systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical lens systems are used for image projection, then image quality is improved, but device size and complexity increase
Solution Approach 1:
The patent removes the optical lens system from the display architecture by using a laser beam scanner that directly scans modulated laser beams across the screen to form images, eliminating the need for projection lenses while maintaining image quality
Solution Approach 2:
The patent replaces the optical lens-based projection system with a laser beam scanning system that uses electro-optic modulation and direct laser scanning to form images, substituting mechanical/optical projection with a more compact laser-based approach
2Adaptability or versatility
If color pixel formation is implemented, then color image capability is improved, but form factor increases
Solution Approach 1:
The patent uses time-division multiplexing where a single pixel location is sequentially activated in red, green, and blue time slots, with the laser beam scanner rapidly cycling through colors faster than human perception can detect, creating the illusion of simultaneous color display
Solution Approach 2:
The patent employs dynamic control of laser beam positioning and timing, where the beam scanner dynamically adjusts its scanning pattern and timing to activate different phosphor regions in sequence, enabling color formation without static color pixel structures
3Illumination intensity
If CRT technology is used, then image brightness and color vividness are improved, but device size and obsolescence increase
Solution Approach 1:
The patent changes the fundamental operating parameters by using laser beams with high intensity and coherence to excite phosphors directly, replacing the cathode ray tube's electron beam mechanism with a solid-state laser source that achieves comparable or superior brightness without the associated complexity
Solution Approach 2:
The patent substitutes the vacuum tube and electron beam mechanism of CRTs with a solid-state laser beam scanning system, replacing complex electro-mechanical components with compact solid-state devices that achieve similar visual output
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
These systems enable the creation of compact, efficient display devices that produce vivid images by using fluorescent materials to emit light under optical excitation, overcoming the limitations of traditional technologies and offering improved form factor and performance.
Implementation Method 1
display systems utilizing screens with fluorescent materials that absorb optical excitation beams, such as laser beams, to emit colored light
Data Source
AI summary
Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots. A screen may include a multi-layer dichroic layer.