Integrated Circuit Anti-Interference Circuit for RF Noise Suppression
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Solution Overview
Problem
RF noise from mobile phones can interfere with data signal transmission between a timing controller and a source driving circuit in display devices, causing abnormality and incorrect image display due to loss of lock in the clock data recovery circuit.
Innovation Solution
An integrated circuit with an anti-interference circuit that dynamically adjusts the variable capacitance from a normal capacitance value to an anti-interference capacitance value when an interference event occurs, using a noise sensing circuit to detect interference and control the capacitance to suppress RF noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed capacitance value is used in the anti-interference circuit, then the circuit structure is simple, but the circuit cannot dynamically respond to RF noise interference
Solution Approach 1:
The patent applies the dynamics principle by replacing fixed capacitance with variable capacitance in the anti-interference circuit. The capacitance value can be dynamically adjusted based on detected RF noise interference levels, allowing the circuit to adapt to varying interference conditions while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent implements parameter changes by modifying the capacitance value of the anti-interference circuit based on interference detection results. The capacitance parameter is changed from a fixed value to a variable value that responds to RF noise conditions, enabling dynamic adjustment of the anti-interference capability.
2Reliability
If the capacitance value is continuously adjusted to suppress RF noise, then the anti-interference performance is improved, but the circuit responds slowly to interference changes
Solution Approach 1:
The patent applies feedback by using a noise sensing circuit to continuously monitor the input signal for RF noise interference and providing this information back to the anti-interference circuit. Based on this feedback, the capacitance value is adjusted to suppress interference, creating a closed-loop control system that improves both performance and response speed.
Solution Approach 2:
The patent implements preliminary action by having the noise sensing circuit continuously detect interference conditions before they cause significant problems. The anti-interference circuit proactively adjusts capacitance in response to detected interference, preventing signal degradation before it occurs rather than reacting after damage has happened.
3Speed
If a complex anti-interference circuit is used to dynamically adjust capacitance, then the response speed is improved, but the circuit occupies more area
Solution Approach 1:
The patent applies merging by integrating the noise sensing circuit and anti-interference circuit into a unified structure within the same IC chip. The capacitance adjustment mechanism is combined with the existing signal processing circuitry, allowing dynamic response while minimizing the additional area occupied by the anti-interference functionality.
Solution Approach 2:
The patent implements universality by designing the anti-interference circuit to serve multiple functions: it provides RF noise suppression, dynamically adjusts capacitance based on interference levels, and integrates with the existing signal processing pathways. This multi-functionality reduces the need for separate dedicated components, thereby limiting area expansion.
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
Effectively suppresses RF noise interference, ensuring correct data signal transmission and image display by dynamically adjusting capacitance in response to interference events, maintaining normal operation when interference is absent.
Implementation Method 1
The anti-interference circuit is coupled to the at least one input pad to provide a variable capacitance. When an interference event occurs to the input signal, the anti-interference circuit is configured to adjust the variable capacitance from a normal capacitance value to at least one anti-interference capacitance value.
Data Source
AI summary
An integrated circuit (IC), a display device and an anti-interference method thereof are provided. The IC includes an input pad, a source driving circuit and an anti-interference circuit. The input pad receives an input signal comprising image data from the external. The source driving circuit is coupled to the input pad to receive the input signal. The anti-interference circuit is coupled to the input pad to provide a variable capacitance. The anti-interference circuit adjusts the variable capacitance from a normal capacitance value to at least one anti-interference capacitance value when an interference event occurs to the input signal. The anti-interference circuit maintains the variable capacitance at the normal capacitance value when the interference event does not occur.