Integrated Optical Construction for Display Systems
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Solution Overview
Problem
The handling and assembly of discrete optical films in liquid crystal display systems are time-consuming and prone to damage, leading to increased manufacturing costs and reduced yield due to the need to remove protective liners and stack individual films, which can result in diminished display performance.
Innovation Solution
An optical construction comprising a reflective polarizer layer, an optical film with interconnected voids, and a diffuser layer, where substantial portions of neighboring major surfaces are in physical contact, enhancing internal reflection and maintaining optical properties while reducing thickness and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple discrete optical films are used in the display system, then the display performance can be optimized through separate light management functions, but the manufacturing complexity and assembly time increase significantly
Solution Approach 1:
The patent combines multiple discrete optical films (prismatic film, diffuser film, and polarizer) into a single integrated optical construction. The prismatic structures, diffuser layer, and polarizing layer are laminated together to form one unified component that performs multiple light management functions simultaneously, eliminating the need to handle and assemble separate films.
Solution Approach 2:
The integrated optical construction serves multiple functions within a single component: the prismatic structures provide light redirection and viewing angle control, the diffuser layer provides illumination uniformity, and the polarizer provides polarization. This multi-functional design reduces the total number of components while maintaining optimized display performance.
2Reliability
If multiple discrete optical films are handled and assembled, then specific optical functions can be achieved, but the handling time and risk of film damage increase
Solution Approach 1:
Multiple optical films with distinct functions (prismatic film, diffuser film, polarizer) are laminated together during manufacturing to form a single integrated optical construction. This pre-assembly eliminates the time-consuming process of removing protective liners and inserting multiple individual sheets into the display frame during final assembly.
Solution Approach 2:
The optical construction is prepared in advance by laminating multiple functional layers together during manufacturing, with protective liners already in place. This preliminary assembly allows the integrated component to be installed as a single unit, avoiding the need for time-consuming individual film handling and reducing the risk of damage during assembly.
3Reliability
If multiple individual films are stacked, then light management functions are achieved, but the opportunity for film damage and reduced yield increases
Solution Approach 1:
The patent laminates multiple optical films together to form a single integrated construction that maintains all necessary light management functions. By reducing the number of discrete films that need to be handled separately, the risk of damage during stacking and assembly is minimized, thereby improving manufacturing yield.
Solution Approach 2:
Protective liners are applied to the optical films during manufacturing before they are laminated together. These liners protect the optical surfaces from damage during the lamination and assembly processes, reducing the risk of defects and improving overall manufacturing yield.
4Reliability
If discrete optical films are used, then specific optical properties can be optimized, but the overall system cost increases due to reduced throughput
Solution Approach 1:
Multiple optical films are combined into a single integrated construction that maintains all necessary optical functions. This reduction in component count speeds up the assembly process and increases manufacturing throughput, thereby reducing overall system cost while preserving optimized optical properties.
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
The optical construction improves system durability, reduces manufacturing costs, and maintains or enhances on-axis brightness and contrast by promoting total internal reflection and enhanced internal reflection, thus addressing the challenges of film handling and assembly in liquid crystal display systems.
Implementation Method 1
The optical film includes a binder, a plurality of interconnected voids, and a plurality of particles... promotes total internal reflection
Implementation Method 2
enhancing internal reflection and maintaining optical properties while reducing thickness and manufacturing complexity
Data Source
AI summary
Optical constructions are disclosed. A disclosed optical construction includes a reflective polarizer layer, and an optical film that is disposed on the reflective polarizer layer. The optical film has an optical haze that is not less than about 50%. Substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other. The optical construction has an axial luminance gain that is not less than about 1.2.