Touch Panel Voltage Storage Elements for Sensing Speed
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Solution Overview
Problem
The increasing voltage conversion time in touch panels, due to larger sizes and better optical performance, affects the sensing speed and accuracy of touch apparatuses, leading to decreased fluency and accuracy in detecting contact points.
Innovation Solution
A touch apparatus with voltage storage elements and a processing unit that manage voltage supply to electrodes, allowing energy storage times to partially overlap and ensuring non-overlapping energy storage times for adjacent electrodes, enabling faster detection by adopting stored voltages when balance is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the voltage conversion time is increased to achieve better optical performance and larger panel sizes, then the touch panel quality is improved, but the sensing speed and accuracy deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-charging capacitor nodes to predetermined voltages before the actual touch detection phase. This allows the voltage conversion process to be completed in advance, so that when touch detection is needed, the voltages are already stable and ready for immediate measurement, thereby decoupling the voltage stabilization time from the sensing time.
Solution Approach 2:
The patent segments the touch panel electrodes into multiple groups that can be charged and detected independently at different times. By dividing the electrode array into segments and processing them in stages with overlapping timing, the system maintains high sensing speed while allowing sufficient voltage conversion time for each segment.
2Measurement precision
If the voltage conversion time is increased to ensure stable voltages, then the measurement accuracy is improved, but the detecting time increases
Solution Approach 1:
The patent performs voltage conversion and stabilization in advance during a preparation phase, so that when the actual touch detection is required, the voltages are already stable. This preliminary action ensures measurement precision without adding to the detecting time, as the stabilization occurs before the detection window.
Solution Approach 2:
The patent implements continuous operation by overlapping the voltage conversion process of one electrode group with the detection process of another group. This continuous pipeline ensures that voltage stabilization and detection occur simultaneously across different segments, eliminating idle time and maintaining high throughput.
3Speed
If the sensing speed is increased to improve fluency, then the user experience is improved, but the voltage stability and calculation accuracy deteriorate
Solution Approach 1:
The patent divides the electrode array into multiple segments that are processed in parallel or overlapping time windows. Each segment has dedicated time for voltage stabilization, ensuring accuracy, while the overall system achieves high sensing speed through the parallel processing of multiple segments.
Solution Approach 2:
The patent performs voltage stabilization as a preliminary step before each detection phase. By ensuring voltages are stable before measurement begins, the system maintains high accuracy even at increased sensing speeds, as each detection cycle starts with properly conditioned voltages.
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 approach reduces the detecting time of touch panels, enhancing the sensing speed and accuracy of contact point calculations, thereby improving the fluency and precision of touch input.
Implementation Method 1
a plurality of voltage storage elements, a voltage supply unit... The voltage storage elements are respectively coupled to the electrodes... the voltage storage element is adapted to achieve a voltage balance within an energy storage time and store a second voltage
Data Source
AI summary
A touch apparatus includes a touch panel, voltage storage elements, a voltage supply unit, and a processing unit. The touch panel has electrodes respectively coupled to the voltage storage elements. When the voltage supply unit does not provide the voltage to the voltage storage element, the voltage storage element achieves a voltage balance within an energy storage time and stores a voltage of the corresponding electrode. The energy storage times of a part of the voltage storage elements at least partially overlap. The energy storage times of two the voltage storage elements respectively coupled to two adjacent electrodes do not overlap with each other. The processing unit is coupled to the electrodes and the voltage storage elements and adopts voltages stored in the voltage storage elements when the voltage balance is achieved.