Optical Apparatus Adhesive Layer for Mirror Display Switching
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Solution Overview
Problem
Conventional optical apparatuses with switchable mirror and display functions often experience a significant decrease in display quality due to defects in the light reflection image caused by foreign matters trapped between the reflection type polarizing plate and the liquid crystal optical element during their attachment.
Innovation Solution
The optical apparatus includes a reflection type polarizing plate bonded to the display device via an adhesive layer on its surface, preventing polarized light from passing through the adhesion interface, thus minimizing the impact of foreign matters on the light reflection image and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the reflection type polarizing plate is directly attached to the liquid crystal optical element, then the device structure is simple, but foreign matters are trapped causing deterioration of light reflection image quality
Solution Approach 1:
An adhesive layer is introduced as an intermediary between the reflection type polarizing plate and the liquid crystal optical element. This adhesive layer acts as a mediator that prevents foreign matters from being trapped at the interface, thereby maintaining light reflection image quality while still providing a relatively simple device structure.
2Manufacturing precision
If the reflection type polarizing plate is attached via adhesive layer, then foreign matters are prevented from affecting the light reflection image, but the device structure becomes more complex
Solution Approach 1:
The adhesive layer serves as a functional intermediary that, while adding a layer to the device structure, prevents the trapping of foreign matters and maintains optical quality. The complexity increase is minimal and justified by the significant improvement in light reflection image quality.
3Strength
If polarized light passes through the adhesion interface, then the attachment is effective, but defects are visible in the light reflection image
Solution Approach 1:
The adhesive layer is designed with specific optical properties (refractive index matching) that make it optically invisible while maintaining mechanical attachment effectiveness. This local quality adjustment ensures that the attachment function is preserved while the optical quality is maintained by making the adhesive layer transparent to polarized light.
Solution Approach 2:
The refractive index of the adhesive layer is carefully selected to match the surrounding optical components, changing the optical parameter to minimize light scattering and reflection at the interface. This parameter optimization ensures that the adhesive layer provides mechanical bonding without creating visible defects in the light reflection image.
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 effectively reduces the visibility of defects in the light reflection image, ensuring that the deterioration of display quality is minimized and maintaining the integrity of the reflection image.
Implementation Method 1
a liquid crystal optical element disposed between the display device and the absorption type polarizing plate
Implementation Method 2
a reflection type polarizing plate disposed between the light emitting device and the liquid crystal optical element
Data Source
AI summary
Provided is an optical apparatus that is capable of switching between a state in which the optical apparatus can reflect light and a state in which the optical apparatus can output light and suppressing deterioration of display quality of a light reflection image. The optical apparatus includes: a light emitting device having a light emitting surface; an absorption type polarizing plate disposed opposite to the light emitting surface of the light emitting device; a liquid crystal optical element disposed between the light emitting device and the absorption type polarizing plate; a reflection type polarizing plate disposed between the light emitting device and the liquid crystal optical element; and an adhesive layer disposed on a surface of the reflection type polarizing plate that faces the light emitting device.