Dynamic Holographic Display Using Adjustable Refractive Index
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Solution Overview
Problem
Conventional holographic plates can only display static images, making it impossible to view dynamic holographic images.
Innovation Solution
A display device comprising optical units with adjustable light transmittance and refractive index, driven by a circuit to modulate laser beams and recreate dynamic holographic images by mimicking the optical path differences of a traditional holographic plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional holographic plate is used to record images, then the holographic image can be displayed, but the image is static and cannot be updated dynamically
Solution Approach 1:
The patent applies the dynamics principle by replacing the static holographic plate with a dynamic liquid crystal display panel that can change its optical properties in real-time. The liquid crystal units can adjust their light transmittance and refractive index dynamically, enabling the holographic image to be updated and changed without replacing the physical medium, thus achieving dynamic display capability while maintaining the holographic effect.
Solution Approach 2:
The patent implements parameter changes by controlling the optical parameters (light transmittance and refractive index) of each liquid crystal unit through applied voltages. By changing these parameters dynamically in response to image data, the system can recreate different holographic images or update the same image, transforming the static nature of conventional holographic plates into a dynamic display system.
2Adaptability or versatility
If the light transmittance and refractive index of optical units are adjusted dynamically, then dynamic holographic images can be displayed, but the device complexity increases
Solution Approach 1:
The patent applies universality by using a single liquid crystal display panel to perform multiple functions: it acts as both the holographic plate medium and the dynamic control element. The same liquid crystal units that control light transmittance also control refractive index, eliminating the need for separate mechanical moving parts or multiple optical components, thus reducing overall device complexity while achieving dynamic holographic display.
Solution Approach 2:
The patent replaces mechanical systems with electro-optical control. Instead of using mechanical moving parts to change holographic images, the system uses electrical signals to control the optical parameters of liquid crystal units. This substitution of mechanical control with electrical-field-based control simplifies the device structure and enables faster, more precise dynamic adjustment of holographic images.
3Productivity
If liquid crystal units are used to modulate laser beams, then the holographic image can be recreated dynamically, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the holographic display into multiple independent liquid crystal units arranged in a grid pattern. Each unit can be controlled independently to modulate the laser beam according to the holographic image data. This segmentation allows for flexible arrangement and reduces the precision requirements compared to a monolithic holographic plate, as each unit operates autonomously within the overall holographic reconstruction process.
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 the dynamic display of holographic images by adjusting optical parameters in real-time, allowing for the recreation of holographic images when irradiated with a reference light beam, overcoming the static image limitation of conventional holographic plates.
Implementation Method 1
each of the optical units is a liquid crystal unit including liquid crystal molecules configured of being deflected under the effect of an electric field
Implementation Method 2
each of the optical units is a liquid crystal unit including liquid crystal molecules configured of being deflected under the effect of an electric field
Implementation Method 3
one or more optical parameters of each of the optical units are adjustable, and the one or more optical parameters comprise at least one of light transmittance or refractive index
Implementation Method 4
the driving circuit is configured to adjust the light transmittance and/or refractive index of each of the optical units... in such a manner that the optical unit is configured to modulate the laser beam
Implementation Method 5
a first polarizer arranged at the side of the optical element, an initial alignment direction of the liquid crystal molecules in the liquid crystal unit being substantially parallel to a transmission axis of the first polarizer; and a second polarizer arranged at a light-exiting side of the optical element, a transmission axis of the second polarizer being perpendicular to the transmission axis of the first polarizer
Data Source
AI summary
A display device and a display method are provided. The display device includes: an optical element including a plurality of optical units arranged independent of each other, wherein one or more optical parameters of each of the optical units are adjustable, and the one or more optical parameters comprise at least one of light transmittance or refractive index; a laser source arranged at a side of the optical element, and configured to emit a laser beam related to a to-be-displayed holographic image; and a driving circuit configured to adjust the light transmittance and/or refractive index of each of the optical units in accordance with image data about the to-be-displayed holographic image in such a manner that the optical unit is configured to modulate the laser beam or a linearly-polarized light beam acquired by converting the laser beam.