Sensor Device Internal Clock for Display Synchronization
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Solution Overview
Problem
Display devices require additional logic circuits for synchronization of clock signals between sensor and display units, increasing complexity and cost.
Innovation Solution
A sensor device and display device that utilize an internal clock signal for synchronization, eliminating the need for additional logic circuits by incorporating a signal generator that generates synchronized driving and demodulation clock signals using a basic clock signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an external clock signal is used for synchronization between sensor and display units, then the sensor unit can operate with external clock signals, but additional logic circuits are required for synchronization processing
Solution Approach 1:
The sensor driver generates its own internal clock signal through a ring oscillator circuit, eliminating the need for external clock signals and synchronization logic. The sensor unit serves itself by producing the timing signals it needs from internal feedback mechanisms, thereby reducing device complexity while maintaining operational versatility.
Solution Approach 2:
The invention extracts and removes the synchronization logic circuits from the system by using an internal clock signal generation mechanism. The ring oscillator circuit replaces the need for external clock input and synchronization processing, thereby simplifying the overall device architecture.
2Reliability
If additional logic circuits are added for clock signal synchronization, then synchronization between sensor and display units is achieved, but device complexity and cost increase
Solution Approach 1:
The sensor driver generates its own internal clock signal through a ring oscillator circuit, eliminating the need for external clock signals and synchronization logic. The sensor unit serves itself by producing the timing signals it needs from internal feedback mechanisms, thereby reducing device complexity while maintaining operational versatility.
Solution Approach 2:
The internal clock signal generated by the ring oscillator serves multiple functions: it provides timing signals for sensor operations, enables synchronization with display units, and eliminates the need for separate synchronization logic circuits. This multi-functional approach maintains reliability while reducing complexity.
Data Source
AI summary
A sensor device includes first sensors; second sensors and the first sensors of mutual capacitance; a sensor transmitter electrically connected to the first sensors, the sensor transmitter supplying driving signals to the first sensors; a sensor receiver electrically connected to the second sensors, the sensor receiver receiving sensing signals from the second sensors, the sensor receiver demodulating the sensing signals by using demodulation clock signals; and a signal generator generating a basic clock signal, and generating the driving signals and the demodulation clock signals to be synchronized with the basic clock signal.