Touch and Electromagnetic Timing Synchronization in Display Panels
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Solution Overview
Problem
Display devices using electromagnetic and touch technologies experience mutual interference between electromagnetic signals and touch signals, affecting sensitivity.
Innovation Solution
Implementing a touch timing control circuit and an electromagnetic film timing control circuit with synchronization signals to stagger the power-on timings of the touch and electromagnetic film circuits, ensuring they do not overlap, allowing for time-sharing detection without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electromagnetic induction technology and touch technology are combined in a display device, then the device can support both electromagnetic pen input and finger touch input, but mutual interference between electromagnetic signals and touch signals occurs, affecting sensitivity
Solution Approach 1:
The patent divides the working time of electromagnetic film circuit and touch control circuit into separate time segments through timing control. The timing control circuit generates different timing control signals for electromagnetic pen detection and touch detection, ensuring they operate in different time windows and do not interfere with each other.
Solution Approach 2:
The patent implements periodic timing control where the electromagnetic film circuit and touch control circuit are activated in alternating periodic cycles. The timing control circuit generates periodic timing control signals that switch between electromagnetic pen detection mode and touch detection mode, preventing simultaneous operation and signal interference.
2Productivity
If electromagnetic film circuit and touch control circuit operate simultaneously, then both functions are available, but signal interference reduces detection accuracy
Solution Approach 1:
The timing control circuit performs preliminary action by pre-establishing the timing sequence before signal detection begins. It generates timing control signals in advance that define the operational windows for electromagnetic and touch circuits, ensuring proper sequencing is in place before actual detection occurs.
Solution Approach 2:
The timing control circuit acts as an intermediary between the electromagnetic film circuit and touch control circuit. It mediates their operation by generating timing control signals that coordinate when each circuit should be active, preventing direct interference while maintaining both functions.
Data Source
AI summary
A display device, a display device control method, and an electronic device are provided. The display device includes a touch control circuit, a touch timing control circuit, an electromagnetic film circuit, and an electromagnetic film timing control circuit. The touch timing control circuit outputs a first timing control signal. The electromagnetic film timing control circuit outputs a second timing control signal. The touch timing control circuit also outputs a first synchronization signal to the electromagnetic film timing control circuit to synchronize a working time sequence of the touch control circuit to the electromagnetic film timing control circuit; and/or the electromagnetic film timing control circuit outputs a second synchronization signal to the touch timing control circuit to synchronize a working time sequence of the electromagnetic film circuit, so that power-on timings of the first timing control signal and the second timing control signal are staggered.