Transparent Printing Layer Hides Infrared Ink in Display Devices
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Solution Overview
Problem
In display devices, the infrared ink layer is visible from the outside, which interferes with the aesthetic appearance and can damage the appearance of the device, especially when the ink penetrates through bright-colored decorative printing layers.
Innovation Solution
A structure where a transparent printing layer is disposed between the decorative print pattern and the infrared printing layer, preventing direct contact and ensuring the infrared ink layer is not visible from the outside, while maintaining high transmittance for optical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the infrared printing layer is disposed directly on the decorative print pattern, then the manufacturing process is simplified, but the infrared ink layer becomes visible from the outside and damages the appearance
Solution Approach 1:
A transparent printing layer is introduced as an intermediary between the decorative print pattern and the infrared printing layer. This transparent layer acts as a mediator that prevents the infrared ink from penetrating through the decorative layer, thereby eliminating the appearance damage while maintaining the simplified manufacturing process of direct stacking.
2Object-generated harmful factors
If the transparent printing layer is added between the decorative print pattern and infrared printing layer, then the appearance is protected, but the device complexity increases
Solution Approach 1:
The transparent printing layer serves multiple functions simultaneously: it protects the appearance by preventing infrared ink penetration, maintains optical signal transmission due to its transparency, and provides a stable base for the infrared printing layer. This multi-functionality justifies the additional layer by delivering multiple benefits from a single structural addition.
3Measurement precision
If the infrared printing layer is made thicker to improve sensor detection, then the sensing efficiency increases, but the infrared ink becomes more visible through the decorative layer
Solution Approach 1:
The transparent printing layer serves as a protective intermediary that allows the infrared printing layer to be made thicker for improved sensor detection without compromising appearance. The transparent layer blocks the infrared ink from penetrating through the decorative layer, enabling increased ink thickness for better sensing while maintaining aesthetic quality.
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 effectively hides the infrared ink layer from view, maintaining the device's appearance and enhancing the sensing efficiency of optical sensors without reducing signal transmission.
Implementation Method 1
a transparent printing layer disposed on the shielding layer... the transparent printing layer and the infrared printing layer overlap the first opening... maintaining high transmittance for optical signals
Data Source
AI summary
Provided are a display device and a method of manufacturing a display device. The display device includes a window; a decorative print pattern disposed on the window; a shielding layer disposed on the decorative print pattern; a transparent printing layer disposed on the shielding layer; and an infrared printing layer disposed on the transparent printing layer and not in contact with the decorative print pattern, wherein the decorative print pattern and the shielding layer include a first opening exposing the window and the transparent printing layer and the infrared printing layer overlap the first opening.