Inkjet Masking for Display Perimeter Light Leakage
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Solution Overview
Problem
Conventional methods for preventing light leakage around the perimeter of display assemblies, such as LCDs and LEDs, are costly and require undesirable chemicals for cleaning and processing, and often result in unsatisfactory results in high contrast ratio environments like sunlight.
Innovation Solution
A method involving ink jetting ink onto the perimeter of a cover glass to create a mask that prevents light leakage, using an ink jet printer to apply one or more layers of ink that can be cured in situ, allowing for customizable designs and reduced material waste, and bonding the cover glass with a touch screen and display to form a display assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional masking methods are used to prevent light leakage, then light leakage prevention is achieved, but manufacturing cost increases and chemical cleaning is required
Solution Approach 1:
The patent replaces conventional mechanical masking methods (such as applying physical masks or coatings that require chemical cleaning) with an inkjet printing system. The inkjet printer deposits masking material directly onto the display perimeter through a digital printing process, eliminating the need for mechanical mask application and chemical cleaning procedures.
Solution Approach 2:
The patent uses digital inkjet printing to create a precise copy or representation of the desired masking pattern directly on the display component. The inkjet system reproduces the masking design through digitally controlled ink deposition, replacing physical mask templates and their associated handling procedures.
2Object-affected harmful factors
If conventional masking methods are used to prevent light leakage, then light leakage prevention is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical masking and chemical cleaning systems with a digital inkjet printing process. The inkjet printer directly deposits masking material in the exact positions needed, eliminating the complexity of mask alignment, application, and subsequent chemical cleaning procedures.
Solution Approach 2:
The inkjet printing system performs the masking function directly on the display component without requiring separate masking and cleaning processes. The digital printing process inherently places material only where needed, making the process self-sufficient and eliminating the need for additional cleaning steps.
3Object-affected harmful factors
If conventional masking methods are used to prevent light leakage, then perimeter masking is achieved, but customization flexibility is reduced
Solution Approach 1:
The patent implements a dynamic masking system through digital inkjet printing. The masking pattern can be dynamically changed by simply updating the digital print file, allowing for easy customization of mask designs, patterns, and positions without requiring physical mask changes or retooling.
Solution Approach 2:
The inkjet printing system provides universal masking capability that can accommodate various mask designs, patterns, and configurations using the same equipment. The digital printing process can produce different masking patterns (solid, patterned, gradient) and can be applied to different display sizes and shapes, providing multi-functionality.
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 ink jetted mask effectively reduces light leakage, enhancing readability in sunlight by providing high contrast ratios without the need for expensive materials or complex cleaning processes, and allows for customizable designs to match various applications.
Implementation Method 1
ink jetting an ink covering onto a perimeter portion of the cover glass
Data Source
AI summary
A method of making a display assembly includes providing a display, providing a cover glass, ink jetting an ink covering onto a perimeter portion of the cover glass, and assembling the display to the cover glass to form the display assembly. The ink covering prevents light from leaking from the display through the perimeter portion of the cover glass.