Transmissive Holographic Optical Element for High-Luminance Transparent Screens
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Solution Overview
Problem
Current advertising display devices, such as LCDs and projection TVs, face high operating costs and low advertising efficiency due to weight and heat issues, and traditional transparent screens obstruct visibility with their opacity.
Innovation Solution
A holographic optical element using a transmissive hologram recording method with a multi-diverging object beam and reference beam is developed, integrated into a transparent screen device, allowing for high luminance, wide field of view, and full-color representation without obstructing the view behind the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a traditional transparent screen is used, then visibility through the screen is obstructed by its opacity, but if a holographic optical element is used, then visibility is maintained while images can be displayed
Solution Approach 1:
The patent uses a transmissive hologram recording method that sequentially uses red related light, green related light, and blue related light as the object beam to create a full-color holographic optical element. This allows the screen to display vibrant images while maintaining transparency, as the holographic structure modulates light rather than blocking it like traditional opaque screens.
Solution Approach 2:
The patent changes the incident angles of different color lights (red, green, blue) to optimize the holographic recording process. By adjusting these parameters, the system achieves high luminance and wide field of view while maintaining screen transparency, resolving the contradiction between image quality and visibility.
2Productivity
If display devices such as LCDs and projection TVs are installed for advertising, then advertising content can be displayed, but operating costs are expensive and advertising efficiency is low due to weight and heat issues
Solution Approach 1:
The patent replaces heavy, heat-generating display devices (LCDs, projection TVs) with a holographic optical element that is lightweight and generates minimal heat. The holographic screen works by modulating light from a projector, eliminating the need for power-hungry display panels while maintaining advertising effectiveness.
Solution Approach 2:
The patent extracts only the essential function of displaying advertising content from traditional display devices, separating it from the heavy, energy-consuming components. By using a holographic optical element combined with a projector, the system achieves advertising display functionality with dramatically reduced weight and energy consumption.
3Adaptability or versatility
If display devices are installed in restricted spaces, then advertising can be displayed in high-traffic areas, but the weight of the display device makes installation difficult without auxiliary tools
Solution Approach 1:
The patent divides the traditional monolithic display device into two separate components: a lightweight holographic optical element and a projector. This segmentation allows the holographic screen to be easily installed in restricted spaces without heavy mounting requirements, while the projector can be positioned separately.
Solution Approach 2:
The holographic optical element is manufactured as a thin, lightweight film that can be easily installed in various locations without requiring heavy support structures. This enables installation in restricted spaces such as shop windows and display areas where traditional heavy display devices cannot be mounted.
4Area of stationary object
If a holographic optical element is manufactured larger than reference using multi-recording methods, then large-size screens can be produced, but manufacturing complexity increases
Solution Approach 1:
The patent uses a multi-recording method that divides the large holographic optical element into multiple recording regions. By sequentially recording different portions of the hologram using mask shifting and tiling techniques, the system can manufacture large-size screens while managing manufacturing complexity through systematic segmentation of the recording process.
Solution Approach 2:
The patent extends the holographic recording process into the time dimension by sequentially recording different color components (red, green, blue) and different spatial regions. This multi-dimensional approach allows the manufacturing of large, full-color holographic screens by breaking down the complex task into manageable sequential steps.
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
The solution provides high optical efficiency, removes chromatic dispersion, increases the projection angle range, and allows for easy manufacturing of large-size screens at a lower cost, enabling effective and unobstructed image observation.
Implementation Method 1
The object beam may transmit at least one of a prism sheet, a lens array, and a diffusion plate to be multi-diverged
Implementation Method 2
The object beam may transmit at least one of a prism sheet, a lens array, and a diffusion plate to be multi-diverged
Implementation Method 3
The object beam may transmit at least one of a prism sheet, a lens array, and a diffusion plate to be multi-diverged
Implementation Method 4
forming a pattern on the base film based on a multi-diverging object beam and a reference beam using a transmissive hologram recording method
Data Source
AI summary
The present invention suggests a holographic optical element which forms a pattern according to a transmissive hologram recording method based on a multi-diverging object beam and a reference beam, a method for generating the same, and a screen device including the holographic optical element. The holographic optical element according to the present invention includes a base film and a pattern which is formed on the base film by using a transmissive hologram recording method based on a multi-diverging object beam and a reference beam.