Switchable Viewing Angle Film for Reversible Light Blocking
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Solution Overview
Problem
Existing viewing angle varying films require removal to restore the viewing angle, lack flexibility in adjusting viewing characteristics, and necessitate multiple molds for different user requirements, leading to increased manufacturing costs.
Innovation Solution
A viewing angle varying film comprising a first film, a second film with electrodes, and a viewing angle varying layer with differently configured first and second structures that can be selectively switched between light blocking and transmitting modes using sub-electrodes, allowing for varied viewing angles without the need for multiple molds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a film type viewing angle varying film with light blocking areas is used, then light transmission in specific directions is blocked, but the viewing angle cannot be restored without removing the film
Solution Approach 1:
The patent applies a dynamic principle by using switchable structures (such as electrochromic or liquid crystal elements) that can change their light blocking properties on demand. These structures allow the viewing angle varying film to dynamically adjust between different viewing angle states, enabling restoration of the original viewing angle without removing the film. The switchable structures respond to electrical signals or other control mechanisms, providing reversible control over light transmission.
2Adaptability or versatility
If multiple molds are used for different user requirements, then various viewing field characteristics can be achieved, but manufacturing costs increase
Solution Approach 1:
The patent implements a universal design by creating a single mold that can produce viewing angle varying films with multiple different patterns or configurations. This is achieved through a mold comprising multiple cavities, where each cavity can form a different pattern of light blocking structures. By using this multi-cavity mold, manufacturers can produce films with various viewing field characteristics (different viewing angles, privacy levels, etc.) from a single mold, eliminating the need for multiple separate molds and significantly reducing manufacturing costs while maintaining product versatility.
3Object-affected harmful factors
If light blocking areas with black pigment are used, then light transmittance is reduced at specific viewing angles, but the film lacks flexibility in adjusting viewing characteristics
Solution Approach 1:
The patent replaces static light blocking areas with black pigment with dynamic switchable structures that can change their light blocking properties. These switchable structures (such as electrochromic layers or liquid crystal structures) can be controlled to transition between transparent and opaque states, or between different levels of light blocking. This provides flexibility in adjusting viewing characteristics, allowing users to modify the viewing angle and privacy levels according to their needs, rather than being limited to fixed characteristics determined by the physical pattern of black pigment areas.
Data Source
AI summary
Provided is a viewing angle varying film. The viewing angle varying film includes a first film, a second film that overlaps the first film and is spaced apart from the first film, a first electrode on the first film, a second electrode on the second film, and a viewing angle varying layer between the first electrode and the second electrode. The viewing angle varying layer includes a plurality of first structures and a plurality of second structures including colored particles and are spaced apart from each other. At least one or more of a height, a width, and a shape of the plurality of first structures and the plurality of second structures is different. Accordingly, various viewing field characteristics may be satisfied.