Shared Substrate Touch Display with Spacer Electrodes
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Solution Overview
Problem
Conventional display apparatuses with integrated touch sensing require separate substrates for the display and sensing parts, leading to increased thickness and bezel size due to the need for additional sensing electrodes and adhesive layers, which complicates manufacturing and user interaction.
Innovation Solution
A display apparatus design where the second substrate is shared by both the display and sensing parts, with the second electrodes acting as both sensing and display electrodes, and a spacer maintains the necessary distance between the electrodes, allowing for a thinner and more flexible touch-sensitive display with a narrow bezel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate substrates are used for display and sensing parts, then touch sensing capability is achieved, but thickness and bezel size increase
Solution Approach 1:
The patent merges the display and sensing functions into a single integrated structure where the second substrate serves both as the display substrate and the sensing substrate. The second electrodes are formed on this shared substrate, eliminating the need for separate substrates and reducing overall thickness and bezel size while maintaining touch sensing capability.
Solution Approach 2:
The second substrate is designed to perform multiple functions simultaneously: it serves as the display substrate for the pixel and as the sensing substrate for the second electrodes. This multi-functional design reduces the number of components and achieves thinner profile without compromising sensing performance.
2Reliability
If additional sensing electrodes and adhesive layers are added, then touch sensing is enabled, but manufacturing complexity increases
Solution Approach 1:
The patent combines the formation of second electrodes with the existing display manufacturing process. The second electrodes are formed on the second substrate using the same thin film deposition techniques already employed for display electrodes, eliminating the need for separate sensing electrode fabrication steps and reducing manufacturing complexity.
Solution Approach 2:
The second substrate and second electrodes are designed to serve dual purposes in the manufacturing process. The same substrate fabrication and electrode deposition processes produce both display and sensing components simultaneously, simplifying the overall manufacturing workflow.
3Stability of the object's composition
If separate substrates with adhesive layers are used, then structural stability is achieved, but flexibility is reduced
Solution Approach 1:
The patent eliminates adhesive layers by directly integrating the sensing electrodes onto the display substrate. This direct integration removes the adhesive interface that would compromise flexibility, while the spacer maintains necessary spacing for structural stability and sensing function.
Solution Approach 2:
The patent employs thin film structures for the second electrodes and uses a spacer to maintain appropriate spacing. This thin-film approach enables the display apparatus to achieve flexibility while maintaining structural integrity and sensing capability, allowing the device to be bent or folded without damage.
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 design reduces the thickness and bezel size of the display apparatus, enhances flexibility, and simplifies the manufacturing process while maintaining effective touch sensing capabilities, resulting in a more compact and user-friendly interface.
Implementation Method 1
a sensing part including a first electrode provided between the first substrate and the spacer and a second electrode provided between the spacer and the pixel
Data Source
AI summary
A display apparatus includes a first substrate, a spacer provided on the first substrate, a second substrate on the spacer, a pixel provided on the second substrate and configured to display an image, a sensing part including a first electrode provided between the first substrate and the spacer and a second electrode provided between the spacer and the pixel.