Display Interface Reset Unit for Common Mode Voltage Stability
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Solution Overview
Problem
Existing display device interface systems face communication performance issues due to unstable input common mode voltages, leading to synchronization failures between transmitters and receivers.
Innovation Solution
An interface system with a transmitter and receiver coupled through transmission lines, where the receiver includes a reset unit with reference switches and a bias voltage supply unit to periodically reset input common mode voltages based on a reset signal, and a transmission controller that measures balance fail time to adjust the reset period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If AC coupling capacitors are used to minimize DC components, then input common mode voltage stability improves, but communication performance deteriorates due to voltage drift over time
Solution Approach 1:
The patent implements periodic resetting of the input common mode voltage through a reset unit that is activated at predetermined time intervals. This periodic action counteracts the gradual voltage drift caused by AC coupling capacitors, maintaining both voltage stability and communication reliability over extended operation periods.
Solution Approach 2:
The reset unit automatically resets the input common mode voltage without external intervention, using internal timing mechanisms to trigger resets at appropriate intervals. This self-service approach ensures continuous optimal performance without requiring manual calibration or external control.
2Stability of the object's composition
If reset operations are performed frequently, then input common mode voltage stability improves, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The system incorporates a feedback mechanism that monitors the input common mode voltage level and triggers reset operations only when necessary. This feedback-based approach maintains voltage stability while avoiding unnecessary reset operations, thereby simplifying the control mechanism compared to fixed-frequency resetting.
3Productivity
If AC coupling capacitors are used to reduce DC components, then signal transmission improves, but synchronization between transmitter and receiver deteriorates
Solution Approach 1:
Periodic resetting of the input common mode voltage synchronizes the DC voltage levels between transmitter and receiver at regular intervals. This maintains accurate synchronization while allowing AC coupling capacitors to continue blocking DC components for effective signal transmission.
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 improves communication performance by stabilizing input common mode voltages, reducing synchronization failures and enhancing data transmission reliability in display devices.
Implementation Method 1
an AC coupling capacitor for reducing or minimizing a DC component of a signal is coupled to a transmission line
Implementation Method 2
the first reference switch is coupled between a reference power source and the first transmission line, and wherein the second reference switch is coupled between the reference power source and the second transmission line
Data Source
AI summary
An interface system may include a transmitter and a receiver, which are coupled to each other through transmission lines, wherein the transmitter includes a transmission controller configured to transmit a reset signal to the receiver, wherein the receiver includes a reset unit configured to reset input common mode voltages of the transmission lines, based on the reset signal, and wherein the transmission lines include a first transmission line for transmitting a signal having a first phase, and a second transmission line for transmitting a signal having a second phase that is different from the first phase.