Touch Detection Electrode Overlap with Outer Display Wiring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses with touch detection functions face challenges in utilizing their wiring configurations for touch detection, as the fingerprint sensor and display output wiring are typically independent, making it difficult to integrate touch detection functionality into the display apparatus.
Innovation Solution
A display apparatus with a touch detection function is designed to incorporate a display device, pixel signal lines, outer display region wiring, and touch detection electrodes, where the touch detection electrodes are positioned to overlap with the outer display region wiring, allowing for capacitance-based touch detection using mutual capacitance principles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fingerprint sensor is arranged independently from the display output configuration, then touch detection function can be achieved, but wiring cannot be reused and device complexity increases
Solution Approach 1:
The patent merges the display output wiring with the touch detection wiring by positioning the touch detection electrode to overlap with the pixel signal line outside the display region. This allows the same wiring structure to serve dual purposes: transmitting pixel signals for display output and serving as the detection electrode for touch sensing, thereby eliminating the need for separate independent wiring for the fingerprint sensor.
Solution Approach 2:
The pixel signal line is designed to perform multiple functions: it serves as both the signal transmission line for display output and as the detection electrode for touch detection. By extending the pixel signal line outside the display region and positioning the touch detection electrode to overlap with it, the wiring structure achieves multi-functionality, reducing overall device complexity while maintaining reliable touch detection.
2Adaptability or versatility
If separate wiring is used for display output and touch detection, then functional independence is achieved, but component count increases
Solution Approach 1:
The patent combines the display output function and touch detection function into a single integrated wiring structure. The pixel signal line extends outside the display region and overlaps with the touch detection electrode, allowing one wiring structure to fulfill both functions simultaneously, thereby reducing the total component count while preserving functional versatility.
Solution Approach 2:
The pixel signal line is designed as a multi-functional element that serves both as the signal transmission path for display output and as the detection electrode for touch sensing. This universal wiring structure eliminates the need for separate dedicated wiring for each function, reducing component quantity while maintaining adaptability for both display and touch detection operations.
3Reliability
If independent fingerprint sensor configuration is used, then touch detection capability is achieved, but apparatus thickness increases
Solution Approach 1:
The patent merges the fingerprint sensor configuration with the display output structure by positioning the touch detection electrode to overlap with the pixel signal line outside the display region. This integrated approach eliminates the need for separate independent sensor layers and wiring, thereby reducing the overall apparatus thickness while maintaining reliable fingerprint detection capability.
Solution Approach 2:
The pixel signal line serves dual purposes as both display signal transmission and touch detection electrode, eliminating the need for additional separate sensor components and their associated wiring. This multi-functional design reduces the stack height and overall thickness of the apparatus while preserving complete fingerprint detection 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
This configuration enables the effective use of existing wiring for touch detection, reducing component count and thickness, while allowing for both touch detection and display output to be integrated seamlessly, enhancing the apparatus's functionality and usability.
Implementation Method 1
a touch detection electrode arranged at a position overlapping the outer display region wiring in a non-contact state
Implementation Method 2
allowing for capacitance-based touch detection using mutual capacitance principles
Data Source
AI summary
According to an aspect, a display apparatus with a touch detection function includes: a display device including a display region in which a plurality of pixels are arranged; a pixel signal line that transmits a pixel signal to the pixel; outer display region wiring including wiring that is electrically coupled to the pixel signal line and extends along a predetermined direction outside the display region; and a touch detection electrode arranged at a position overlapping the outer display region wiring in a non-contact state, a longitudinal direction of the touch detection electrode being along a direction intersecting with the predetermined direction.