Electrophoretic Display Stack Thickness Reduction
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Solution Overview
Problem
Conventional electronic devices with displays are bulky and heavy due to the use of multiple layers of glass or substrate materials, which hinders user experience in terms of portability and comfort during media consumption.
Innovation Solution
The design incorporates a single transparent substrate with a thin film transistor (TFT) array and a conductive substrate, eliminating the need for an additional dedicated substrate by using transparent conductive materials like indium tin oxide (ITO) or silver nanowire, and includes a front plane laminate with movable charged particles for display functionality, along with capacitive touch sensors and antiglare components to reduce thickness and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple layers of glass or substrate materials are used in display construction, then structural strength and stability are improved, but device weight and thickness increase
Solution Approach 1:
The patent combines the substrate and transparent conductive layer into a single integrated structure. The transparent conductive layer (ITO or silver nanowire) is deposited directly onto the substrate, eliminating the need for separate dedicated conductive substrates and reducing the total number of layers while maintaining both structural integrity and electrical functionality.
Solution Approach 2:
The patent employs thin film structures for the transparent conductive layer and front plane laminate. These thin films provide the necessary electrical and structural properties with minimal thickness, significantly reducing overall device weight and thickness compared to conventional glass layers.
2Strength
If multiple layers of glass or substrate materials are used in display construction, then structural strength and stability are improved, but device thickness increases
Solution Approach 1:
The patent merges multiple functional layers into fewer integrated structures. The substrate serves dual purposes as both structural support and base for the transparent conductive layer, while the front plane laminate integrates the display medium and protective functions, reducing the number of discrete glass layers and overall device thickness.
Solution Approach 2:
The use of thin film technologies for transparent conductive layers and front plane laminates enables achieving the required structural strength and electrical properties with dramatically reduced thickness compared to conventional glass substrate approaches.
3Reliability
If conventional display structures with multiple substrates are used, then manufacturing reliability is maintained, but device weight and complexity increase
Solution Approach 1:
The patent reduces structural complexity by integrating the transparent conductive layer with the substrate and using a single dedicated substrate throughout the display stack. This simplified architecture reduces the number of interfaces and assembly steps, thereby maintaining manufacturing reliability while reducing device complexity.
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
This configuration results in a thinner, lighter electronic device that maintains display functionality and user interaction capabilities while reducing weight and thickness without compromising performance, enhancing user satisfaction and portability.
Implementation Method 1
a front plane laminate with movable charged particles for display functionality
Implementation Method 2
capacitive touch sensors
Data Source
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AI summary
This disclosure describes electronic devices that include displays for rendering content, touch sensors disposed beneath the displays for detecting touch inputs, and antiglare components for reducing glare caused by ambient light. In some embodiments, the displays include a single transparent substrate, a thin film transistor array connected to a bottom surface of the transparent substrate, a conductive substrate, and a front plane laminate connected to the conductive substrate. In such embodiments, the front plane laminate is connected to the thin film transistor array, and the array comprises a plurality of transparent electrodes. This disclosure also describes techniques for manufacturing displays utilized with electronic devices.