Display Signal Controller Using Differential Input Synchronization
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Solution Overview
Problem
Existing display devices, particularly LCDs, face challenges in reducing noise and simplifying their structure, especially when handling digital input signals, which often require complex circuits and many input pins, leading to high signal-to-noise ratios and increased complexity.
Innovation Solution
A display device with a simplified structure that includes a signal controller receiving digital input signals through two or less input terminals, processing them in synchronization with a clock signal generated by a receiver and clock generator, using differential signaling and synchronization signals to reduce noise and complexity, and controlling both gate and data drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If digital input signals are processed using conventional methods with multiple input terminals, then signal processing capability is maintained, but device complexity and noise increase
Solution Approach 1:
The patent combines multiple input signals (data signals and control signals) into a single differential signal pair for transmission. The signal controller integrates the reception and processing of these signals, reducing the number of input terminals from multiple separate terminals to just two differential terminals, thereby simplifying the overall device structure while maintaining signal integrity through differential signaling
Solution Approach 2:
The patent introduces a differential signaling mechanism as an intermediary between the input signals and the signal controller. This differential signaling acts as a mediator that transmits both data and control information through a controlled impedance transmission line, reducing electromagnetic interference and improving signal-to-noise ratio while maintaining processing capability
2Ease of operation
If multiple input terminals are used for digital signals, then signal processing capability is maintained, but the number of input pins increases
Solution Approach 1:
The patent merges multiple input signals into a single differential signal pair. Instead of requiring separate input terminals for data signals and control signals, the invention transmits all information through two complementary differential lines, significantly reducing the number of input pins required while preserving full signal processing capability
Solution Approach 2:
The differential signal pair serves multiple functions simultaneously - transmitting data signals, control signals, and synchronization information all through the same two input terminals. This multi-functional approach eliminates the need for separate dedicated terminals for each signal type, reducing pin count while maintaining operational capability
Data Source
AI summary
A display device includes a display panel, a gate driver, a data driver, and a signal controller that receives digital input signals including an input control signal and an input image signal in series through two or less input terminals, and processes the input image signal and applies the processed input image signal to the data driver, wherein the signal controller includes a receiver receiving the input signals and a clock generator generating a clock signal based on the input control signal, the signal controller processing the input image signal in synchronization with the clock signal. Thus, the structure of the display device can be simplified while signal loss and noises can be reduced.