Switchable Electrode Arrays for Double-Side Touch Sensing
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Solution Overview
Problem
Current touch-sensitive devices are limited to single-side touch sensing and cannot perform double-side touch sensing.
Innovation Solution
A touch-sensitive device with an array of first and second electrodes on a touch-sensing carrier panel, connected via switches to switch between driving and inductive signal lines, allowing for double-side touch sensing by alternating signal connections between the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-side touch-sensitive device structure is used, then the device structure is simple, but the device cannot perform double-side touch sensing
Solution Approach 1:
The patent applies dynamics by making the electrode connections switchable between different states. The first and second electrodes can be dynamically connected to either the driving signal line or the inductive signal line through switches, allowing the same physical structure to function as a single-side device or a double-side device depending on the switching state. This dynamic reconfiguration enables the device to adapt its touch sensing capability without changing its physical structure.
Solution Approach 2:
The patent implements multi-functionality by designing the electrode array to serve multiple functions. The same array of first and second electrodes can function as driving electrodes, inductive electrodes, or a combination thereof, depending on the switch configuration. This universal design allows the device to perform both single-side and double-side touch sensing, as well as display functions, within the same structural framework.
2Adaptability or versatility
If electrodes are connected to both driving and inductive signal lines simultaneously, then double-side touch sensing is enabled, but the signal interference increases
Solution Approach 1:
The patent applies periodic action by using switches to alternately connect the electrode arrays to the driving signal line and the inductive signal line in a time-division manner. During one period, the first electrodes are connected to the driving signal line while the second electrodes are connected to the inductive signal line, and then the connections are swapped in the next period. This periodic switching prevents simultaneous connection to both lines, thereby eliminating signal interference while enabling double-side touch sensing capability.
Solution Approach 2:
The patent implements preliminary action by configuring the switches to establish the appropriate electrode connections before signal transmission begins. The control circuit pre-establishes which electrodes are connected to driving signal lines and which are connected to inductive signal lines in advance, ensuring that when signals are transmitted, the electrodes are already in the correct configuration to avoid interference and enable proper touch sensing.
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 double-side touch sensing by effectively switching the roles of the electrodes between driving and inductive signal lines, enhancing the device's capability to detect touches on both sides of the panel.
Implementation Method 1
There is a mutual inductive capacitance between the driving electrode 120 and the inductive electrode 130. When a driving signal is applied to the driving electrode 120, an inductive signal is obtained correspondingly on the inductive electrode 130 by coupling of the mutual inductive capacitance.
Implementation Method 2
an inductive signal is obtained correspondingly on the inductive electrode 130 by coupling of the mutual inductive capacitance
Implementation Method 3
a first switch having an end connected to the array of the first electrodes and the other end connected to the corresponding driving signal line and the corresponding inductive signal line
Data Source
AI summary
A touch-sensitive device comprises: a touch-sensing carrier panel; a driving signal line and a inductive signal line; a touch-sensitive circuit connected with the driving signal line and the inductive signal line; an array of first electrodes and an array of second electrodes located on the touch-sensing carrier panel; a first switch having an end connected to the array of the first electrodes and the other end connected to the corresponding driving signal line and the corresponding inductive signal line; and a second switch having an end connected to the array of the second electrodes and the other end connected to the corresponding driving signal line and the corresponding inductive signal line, wherein each of the first switch and the second switch is adapted to switch between a respective driving signal line and a respective inductive signal line such that the array of first electrodes is connected with one of the driving signal line and the inductive signal line and the array of second electrodes is connected with the other one of the driving signal line and the inductive signal line. The present disclosure also provides a method for driving the above touch-sensitive device. The present invention may perform the signal conversion by switches such that the first electrodes and the second electrodes are switched between the connections to the inductive signal lines and the connections to the driving signal lines by performing signal switching by switches, so as to achieve the double side touch sensing.