Nano Light Absorbing Layer for Display Viewing Angle Control
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Solution Overview
Problem
Conventional light control films for displays suffer from poor precision and brightness degradation, making it difficult to accurately recognize image information, especially under severe external light reflection conditions, and require separate manufacturing for wide and narrow viewing angles, which is inefficient.
Innovation Solution
A light control film with a nano-scale light absorbing layer structure, comprising a lower layer, a middle layer with a predetermined thickness, and a plurality of nano light absorbing layers arrayed along the first axis, where the ratio of interval to width is between 10:1 to 20:1, and the ratio of interval to height is between 1:1 to 1:4, ensuring high light absorption and aperture ratio without degrading display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light control film is used to narrow the viewing angle, then the viewing angle control is improved, but the display brightness is degraded and precision is poor
Solution Approach 1:
The light control film is segmented into multiple functional layers: a lower layer, a middle layer with nano light absorbing layers, and an upper layer. This segmentation allows each layer to perform specific functions - the lower and upper layers maintain brightness while the middle layer with precisely positioned nano structures controls the viewing angle, thus resolving the contradiction between precision and brightness
Solution Approach 2:
The middle layer features locally concentrated light absorbing nano structures with specific dimensions (width 0.1-1.0 μm, height 1-4 μm, interval 10-20 times the width) that provide precise viewing angle control only in the necessary regions, while the rest of the film structure maintains high light transmission for brightness
2Ease of operation
If a light control film is attached to narrow the viewing angle, then the viewing angle is controlled, but external light reflection is severe and image information recognition is difficult
Solution Approach 1:
The patent converts the harmful effect of external light reflection into a beneficial function by using the same nano light absorbing layer structure to both control viewing angles and absorb reflected external light. The nano structures that limit viewing angles also serve to capture and eliminate reflected light, transforming a harmful factor into a useful feature that enhances image information recognition
3Adaptability or versatility
If separate manufacturing is done for wide and narrow viewing angle displays, then the viewing angle requirement is met, but productivity is poor
Solution Approach 1:
The light control film is designed as a universal component that can be applied to various display types and configurations. The standardized multi-layer structure with adjustable nano structure parameters allows a single film design to serve multiple viewing angle requirements, eliminating the need for separate manufacturing processes for different viewing angle displays and significantly improving productivity
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 solution provides excellent viewing angle control and anti-reflective functionality, maintaining high display brightness and aperture ratio while preventing external light reflection, thus enhancing display quality without the need for additional optical films.
Implementation Method 1
a plurality of nano light absorbing layers arrayed with a predetermined intercals along the first axis in the middle layer
Data Source
AI summary
The present disclosure relates to a light control film having nano (or nano-scale) light absorbing layer and a display using the same. A light control film according to the present disclosure includes a lower layer having a first axis and a second axis, a middle layer having a predetermined thickness disposed between the lower layer and the upper layer, and a plurality of nano light absorbing layers arrayed with a predetermined intercals along the first axis in the middle layer, each of the nano light absorbing layer having a width along the first axis, a length along the second axis and a height corresponding to the thickness of the middle layer, wherein a ratio between the interval and the width of the nano light absorbing layer is selected from any one of 10:1 to 20:1.