Microprism Liquid Crystal Display Spectacles for Viewing Angle Control
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Solution Overview
Problem
Existing liquid crystal display panels are not ideal for wearable display spectacles due to suboptimal display effects caused by close viewing distance and large viewing angles.
Innovation Solution
The display spectacles incorporate a spectacle frame with two display devices as lenses, each comprising a backlight, substrates with a liquid crystal layer and electrode structures that form microprism structures, allowing for controlled total internal reflection or refraction of light to adjust gray scales and viewing angles, utilizing a control unit to manage voltage and achieve desired light propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an existing liquid crystal display panel is used as a spectacle lens, then the device complexity is reduced, but the display effect deteriorates due to large viewing angles and close viewing distance
Solution Approach 1:
The patent applies local quality by creating microprism structures at specific locations within the liquid crystal layer. These microprisms are formed by deflecting liquid crystal molecules in particular regions using electrode structures, enabling different optical properties (total internal reflection vs. refraction) in different areas of the same display device. This localized structural modification addresses the viewing angle and distance issues without redesigning the entire display system.
Solution Approach 2:
The patent utilizes parameter changes by controlling the voltage applied to electrode structures, which changes the deflection angle of liquid crystal molecules. By adjusting this voltage parameter, the system can dynamically control whether light undergoes total internal reflection or refraction at the microprism interfaces, thereby optimizing display performance for different viewing conditions (angles and distances) without physical structural changes.
2Adaptability or versatility
If liquid crystal molecules are deflected to form microprism structures, then the viewing angle adaptation improves, but the device complexity increases due to additional electrode structures
Solution Approach 1:
The patent applies segmentation by dividing the electrode structure into multiple independent electrode structures, each capable of controlling liquid crystal molecules in specific regions. This segmentation allows different parts of the display to be independently controlled to form microprism structures where needed, providing adaptability for various viewing angles while managing complexity through modular electrode design.
3Measurement precision
If voltage is adjusted to control total internal reflection or refraction, then gray scale control improves, but the energy consumption increases
Solution Approach 1:
The patent exploits phase transitions in light propagation by controlling whether light undergoes total internal reflection or refraction at the microprism interfaces. By adjusting voltage to change the optical state (reflection phase vs. refraction phase), the system achieves precise gray scale control. This approach leverages the abrupt changes in light behavior during phase transition to create distinct brightness levels with relatively low energy input.
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
This configuration enhances the display effect by adapting to the characteristics of wearable devices with large viewing angles and close distances, providing improved gray scale control and 3D display capabilities.
Implementation Method 1
the electrode structure deflects liquid crystal molecules in a corresponding region of the liquid crystal layer to form a microprism structure
Implementation Method 2
controlling total internal reflection or refraction of the microprism structure for light emitted from the backlight
Implementation Method 3
controlling total internal reflection or refraction of the microprism structure for light emitted from the backlight
Data Source
AI summary
Display spectacles and a driving method thereof are disclosed. The display spectacles include a spectacle frame and two display devices provided on the spectacle frame as spectacle lenses. Each of the display devices includes a backlight, a lower substrate on a light exit side of the backlight, an upper substrate arranged opposite to the lower substrate, a liquid crystal layer located between the upper substrate and the lower substrate, a plurality of electrode structures located between the upper substrate and the lower substrate, and a control unit. During displaying, the electrode structure deflects liquid crystal molecules in the liquid crystal layer corresponding to the electrode structure to form a microprism structure. The control unit adjusts a voltage on the electrode structure, thereby controlling total internal reflection or refraction of the microprism structure for light emitted from the backlight, and the adjustment for display gray scale can thus be realized.