Touch Drive Device Dynamic Electrode Grouping
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Solution Overview
Problem
Existing touch drive devices for display panels face challenges in optimizing touch drive control functions to synchronize with display operations, particularly when identical display drivers are applied to various panels, requiring flexible patterned touch drive control to optimize both display and touch operations.
Innovation Solution
A touch drive device with a configuration that includes drive electrodes and a detection electrode, where the drive electrodes are grouped into portions and a touch drive signal with a pulse waveform is supplied to selected drive electrode portions, allowing for flexible designation of the number of drive electrodes and target drive electrode portions for touch scanning, enabling independent control of touch and display operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If identical display drivers are applied to various display panels, then device standardization and ease of manufacture are improved, but the ability to optimize touch drive control for different panel specifications deteriorates
Solution Approach 1:
The patent implements dynamic control of touch drive signals by allowing flexible designation of the number of drive electrodes and target drive electrode portions. The touch drive signal with pulse waveform can be dynamically adjusted to supply signals to different numbers of drive electrodes based on panel specifications, enabling the same display driver to adapt to various panel types without hardware changes.
Solution Approach 2:
The patent changes operational parameters of the touch drive control by allowing dynamic adjustment of the number of drive electrodes and target drive electrode portions. By modifying these control parameters, the system optimizes touch detection performance for different display panel specifications while using identical display driver hardware.
2Productivity
If bundle drive is used to improve touch detection speed, then productivity is improved, but the complexity of synchronization control between touch driver and display driver increases
Solution Approach 1:
The patent segments the drive electrodes into multiple portions and allows independent control of each portion. This segmentation enables the touch drive control to selectively activate different numbers of drive electrode portions based on detection needs, achieving high-speed bundle drive while simplifying synchronization control through modular electrode group management.
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 solution allows for flexible and optimized touch drive operations that can be dynamically adjusted to suit various display specifications, improving touch detection accuracy and signal-to-noise ratio, while maintaining synchronization with display operations without the need for changing patterned touch drive control functions.
Implementation Method 1
a capacitive touch panel is known in which a plurality of electrodes each formed to extend in a single direction are intersected to each other. In this touch panel, the electrodes are connected to a control circuit, and when supplied with an excitation current from the control circuit, they detect an external object close thereto.
Data Source
AI summary
According to one embodiment, the touch drive device includes a plurality of drive electrodes arranged side by side to extend in a single direction, a detection electrode which extends in a direction crossing the direction in which the drive electrodes extend, and generates capacitances at intersections of the detection electrode and the drive electrodes, and a driver (DDI) which groups the drive electrodes into a plurality of drive electrode portions each including at least one drive electrode, and performs a touch scanning drive by supplying a touch drive signal (TSVCOM) having a pulse waveform for detection of a closely situated external object to a target drive electrode portion which is a selected one of the drive electrode portions. The number of the drive electrodes included in each of the drive electrode portions and the target drive electrode portion to which the touch drive signal. (TSVCOM) is supplied can be designated.