Printable Film With Light Diffusion Layer For Backlit Displays
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Solution Overview
Problem
Current inkjet printing technologies face challenges in achieving high-quality image printing on large format substrates, particularly in backlit display applications, where the film must balance light transmission and opacity to maintain vibrant colors and prevent interference from light sources, while also ensuring durability against mechanical scratches and light fading.
Innovation Solution
A printable film comprising a polymeric film substrate with a light diffusion layer containing inorganic particles, dispersing agents, and polymeric binders, and an image receiving layer applied on the backside, which allows for uniform light distribution and high-gloss, vivid image printing suitable for both backlit and frontlit applications, with excellent durability and resistance to mechanical damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the film is made more opaque to prevent light interference, then light blocking ability is improved, but light transmission is reduced
Solution Approach 1:
The film structure is divided into distinct layers with different optical properties: the front side remains transparent for light transmission, while the backside incorporates an opaque image receiving layer to block light interference. This local differentiation allows each layer to perform its specific function optimally without compromising overall performance.
Solution Approach 2:
The film is segmented into multiple functional layers including a transparent front side, a light diffusion layer, and an opaque image receiving layer on the backside. This segmentation allows the film to simultaneously achieve light transmission from the front and light blocking from the back, resolving the contradiction between transparency and opacity.
2Manufacturing precision
If the image receiving layer is made more opaque to enhance image vibrancy, then color vividness is improved, but light transmission is reduced
Solution Approach 1:
The film is segmented into multiple functional layers including a transparent front side, a light diffusion layer, and an opaque image receiving layer on the backside. This segmentation allows the film to simultaneously achieve light transmission from the front and light blocking from the back, resolving the contradiction between transparency and opacity.
Solution Approach 2:
Instead of making the entire film opaque to improve image quality, the invention inverts the approach by placing the opaque image receiving layer only on the backside of the film. This allows the front side to remain transparent for light transmission while the backside provides the necessary opacity for vibrant image display.
3Ease of manufacture
If the film structure is simplified for ease of manufacture, then manufacturing complexity is reduced, but image quality and durability are compromised
Solution Approach 1:
The film is segmented into multiple functional layers including a transparent front side, a light diffusion layer, and an opaque image receiving layer on the backside. This segmentation allows the film to simultaneously achieve light transmission from the front and light blocking from the back, resolving the contradiction between transparency and opacity.
4Illumination intensity
If the film is made thinner to improve light transmission, then light transmission is improved, but mechanical strength and scratch resistance are reduced
Solution Approach 1:
The film is segmented into multiple functional layers including a transparent front side, a light diffusion layer, and an opaque image receiving layer on the backside. This segmentation allows the film to simultaneously achieve light transmission from the front and light blocking from the back, resolving the contradiction between transparency and opacity.
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 high-quality, durable images with excellent light transmission and mechanical resistance, ensuring vibrant colors and uniform illumination in backlit displays, while maintaining image clarity and durability in frontlit conditions.
Implementation Method 1
a light diffusion layer, applied on the backside of the polymeric film substrate, which contains inorganic particles
Implementation Method 2
an image receiving layer applied over the light diffusion layer on the backside of the polymeric film substrate
Data Source
AI summary
A printable film that contains a polymeric film substrate with a front side and a backside. The printable film contains also a light diffusion layer and an image receiving layer. The light diffusion layer is applied on the backside of the polymeric film substrate and contains inorganic particles, dispersing agents and polymeric binders. The image receiving layer is applied over the light diffusion layer on the backside of the polymeric film substrate. Also disclosed herein is the method for obtaining the printable film.