Resistive Touch Panel Multi-Point Detection via Matrix Electrodes
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Solution Overview
Problem
Resistive touch panels face challenges in detecting two-point simultaneous touch due to complex wiring routing and inability to downsize the driving section, while composite touch panels combining resistive and capacitive panels struggle with radiation noise interference and inaccurate position detection.
Innovation Solution
A resistive touch panel configuration featuring a transparent conductive film on an upper substrate and strip-shaped electrodes on a lower substrate, allowing signal transmission and reception to determine touch coordinates, and a method of driving this panel in conjunction with a capacitive touch panel to enhance multi-point input accuracy and noise shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent conductive film is disposed on the entire surface of the upper substrate and divided transparent conductive films are disposed on the lower substrate to enable two-point simultaneous touch detection, then multi-point touch detection capability is improved, but wiring routing becomes complex and the driving section cannot be downsized
Solution Approach 1:
The lower substrate's transparent conductive film is divided into multiple divided transparent conductive films arranged in a matrix pattern. This segmentation allows independent control and detection of different regions, enabling multi-point touch detection while simplifying the wiring structure compared to a fully continuous film approach.
Solution Approach 2:
The invention transitions from conventional X-Y electrode arrangements to a matrix arrangement of divided transparent conductive films on the lower substrate. This dimensional reorganization allows signal transmission and reception through multiple paths, enabling accurate multi-point touch detection with reduced wiring complexity.
2Adaptability or versatility
If a capacitive touch panel is disposed on an LCD to enable multi-point input operations, then multi-point input capability is improved, but radiation noise from the LCD causes malfunctions and position detection accuracy deteriorates
Solution Approach 1:
A resistive touch panel is introduced as an intermediary layer between the user and the capacitive touch panel/LCD system. The resistive touch panel includes a pressure-sensitive sheet with conductive particles that detect touch through mechanical pressure, providing a shield against radiation noise from the LCD while maintaining multi-point input capability through the matrix arrangement of divided transparent conductive films.
3Adaptability or versatility
If a capacitive touch panel is used to enable multi-point input operations, then multi-point input capability is improved, but unintentional touches are frequently misjudged as inputs and the panel does not work with non-conductive gloves or insulating stylus pens
Solution Approach 1:
The invention merges the advantages of resistive and capacitive touch panels into a composite structure. The resistive touch panel provides reliable detection with non-conductive objects and eliminates false touches through pressure-based detection, while the capacitive touch panel maintains multi-point input capability. The matrix arrangement of divided transparent conductive films enables both panels to work together harmoniously.
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
Enables accurate detection of two-point simultaneous touch with simplified substrate configuration and reduced wiring complexity, while effectively controlling radiation noise interference, allowing for reliable input detection with non-conductive gloves or stylus pens.
Implementation Method 1
a first substrate including a transparent conductive film electrically floating on an entire surface thereof; a second substrate including a plurality of strip-shaped electrodes made of a transparent conductive film at a predetermined interval so that the transparent conductive film of the second substrate faces the transparent conductive film of the first substrate
Implementation Method 2
detection section configured to detect a ratio in which a signal transmitted to a first strip-shaped electrode of the second substrate is attenuated through a transmission path reaching a second strip-shaped electrode of the second substrate adjacent to the first strip-shaped electrode via the transparent conductive film of the first substrate from the first strip-shaped electrode
Data Source
AI summary
A resistive touch panel includes a first substrate provided with a transparent conductive film electrically floating on an entire surface thereof, a second substrate provided with a plurality of strip-shaped electrodes made of a transparent conductive film at a predetermined interval so that the transparent conductive film of the second substrate faces the transparent conductive film of the first substrate, and a detection section for detecting a ratio in which a signal transmitted to a first strip-shaped electrode of the second substrate is attenuated through a transmission path reaching a second strip-shaped electrode of the second substrate adjacent to the first strip-shaped electrode via the transparent conductive film of the first substrate from the first strip-shaped electrode.