Integrated Input Sensing Part for Display Proximity and Touch
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Solution Overview
Problem
Existing display devices require separate modules for fingerprint, proximity, and illumination sensors, leading to increased complexity and manufacturing costs, while lacking efficient proximity sensing capabilities without additional sensors.
Innovation Solution
A display device with an integrated input sensing part featuring a matrix of first and second sensing electrodes and lines, allowing simultaneous driving of electrodes for proximity sensing, reducing the need for separate sensors and enhancing touch sensitivity by increasing electric field intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate modules are used for fingerprint, proximity, and illumination sensors, then each sensor function is achieved, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines multiple sensor functions (fingerprint sensing, proximity sensing, and touch sensing) into a single integrated sensing structure using the display panel's electrode layers. The first and second sensing electrodes form a unified capacitive sensing network that can detect different types of inputs through the same physical structure, eliminating the need for separate sensor modules and reducing overall device complexity while maintaining all required sensing functions
Solution Approach 2:
The integrated sensing electrodes serve multiple functions simultaneously: they act as touch sensing elements for direct contact input, proximity sensing elements for near-field detection, and fingerprint sensing elements for biometric authentication. This multi-functional design allows a single structure to replace what would traditionally require multiple specialized sensor modules, reducing complexity while achieving reliable sensor performance
2Ease of manufacture
If traditional sensing electrode arrangements are used, then manufacturing is simple, but proximity sensing capability is insufficient without additional sensors
Solution Approach 1:
The sensing structure is divided into first sensing electrodes extending in a first direction and second sensing electrodes extending in a second direction, creating a segmented grid pattern. This segmentation allows different regions and configurations of electrodes to be optimized for different sensing modes: direct contact touch, near-field proximity detection, and fingerprint recognition, all within a single manufactured structure without requiring additional sensor components
3Ease of operation
If sensing electrode density is increased to improve touch sensitivity, then electric field intensity increases, but manufacturing complexity increases
Solution Approach 1:
The patent implements non-uniform electrode spacing where the distance between adjacent sensing electrodes is smaller in regions requiring higher touch sensitivity (such as the central display area) and larger in regions where lower sensitivity is acceptable. This local quality variation optimizes touch responsiveness where needed while maintaining manageable electrode density overall, achieving high sensitivity without proportionally increasing manufacturing complexity across the entire display
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 integrated input sensing part simplifies manufacturing, reduces costs, and enhances touch sensitivity and proximity sensing capabilities without additional sensors, enabling power-saving modes and improved user interaction.
Implementation Method 1
an input sensing part disposed on the display panel. The input sensing part includes a plurality of first sensing electrodes each extending in a first direction and arranged in a second direction crossing the first direction
Data Source
AI summary
A display device includes a display panel and an input sensing part disposed on the display panel. The input sensing part includes first sensing electrodes extending in a first direction and arranged in a second direction crossing the first direction, first lines connected to the first sensing electrodes, second sensing electrodes extending in the second direction and arranged in the first direction, and second lines connected to the second sensing electrodes. The second lines include second-first lines defined as j-th to k-th second lines, and the first lines are connected to the second-first lines.