Laminated Panel Interlayer Structure for Heat-Blocking Roof Glass
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to create an interlayer film structure for laminated panels that effectively blocks heat rays while maintaining a sense of openness and sufficient light transmissiveness, particularly for full glass top designs in self-driving cars and EVs.
Innovation Solution
The solution involves a combination of two specified light-modulating films: a first film capable of switching between light transmission and light scattering, and a second film capable of adjusting visible light transmittance. These films are arranged in the thickness direction of the laminated panel, with the second film disposed closer to the outdoor side, and are bonded using internal and surface-transparent adhesion layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If PDLC film is used alone for roof glass, then light transmissiveness is improved, but heat insulation ability deteriorates
Solution Approach 1:
The patent combines PDLC film with electrochromic film to create a composite light-modulating structure. The PDLC film provides light scattering and transmissiveness control, while the electrochromic film adds heat ray blocking capability. This composite structure achieves both high light transmissiveness and effective heat insulation, resolving the contradiction between these two properties.
2Object-affected harmful factors
If deep color laminated glass is used for roof, then heat insulation ability is improved, but sense of openness and light transmissiveness deteriorate
Solution Approach 1:
The patent employs dynamically controllable light-modulating films (PDLC and electrochromic) that can switch between different states. The PDLC film can transition between scattered and clear states, while the electrochromic film can adjust its light absorption. This dynamic control allows the system to provide heat insulation when needed while maintaining openness and light transmissiveness when desired, eliminating the static compromise of deep color glass.
3Object-affected harmful factors
If combination of PDLC with deep color glass is used, then heat insulation ability is improved, but light transmissiveness and sense of openness deteriorate
Solution Approach 1:
The patent changes the operational parameters of the light-modulating films by applying voltage control. The electrochromic film's light absorption properties can be adjusted by varying the applied voltage, allowing dynamic control of both heat blocking and visible light transmission. This parameter control enables the system to achieve heat insulation without permanently sacrificing light transmissiveness and sense of openness.
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 appropriately prevents the entry of heat rays, maintains a sufficient sense of openness, and ensures high light transmissiveness in the light-transmission mode, effectively addressing the limitations of existing technologies.
Implementation Method 1
a first light-modulating film capable of switching between light transmission and light scattering
Implementation Method 2
a second light-modulating film capable of adjusting a visible light transmittance
Data Source
AI summary
An interlayer film structure is configured to be sandwiched between two transparent panels. The interlayer film structure includes a first light-modulating film capable of switching between light transmission and light scattering, and a second light-modulating film capable of adjusting a visible light transmittance. The first light-modulating film and the second light-modulating film are arranged in a thickness direction.