Display Device Gate Driver Feedback Timing Control
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Solution Overview
Problem
Display devices face issues with luminance due to resistance-capacitance (RC) delays, where the timing of data signals does not match the timing of gate signals, resulting in insufficient charging of pixels and suboptimal light emission.
Innovation Solution
A display device and method that include a gate driver generating feedback signals by comparing data signals with gate signals, allowing a timing controller to set a delay value for the clock signal based on the feedback, ensuring accurate synchronization of data and gate signals to address RC delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If data signals are supplied to pixels, then pixels can be charged and emit light, but RC delays cause timing mismatch between data signals and gate signals resulting in insufficient charging and reduced luminance
Solution Approach 1:
The gate driver generates a feedback signal by comparing the data signal with the gate signal to detect timing mismatch caused by RC delays. This feedback signal is sent to the timing controller, which adjusts the clock signal timing to synchronize data signal arrival with gate signal timing, thereby resolving the timing mismatch and improving luminance
Solution Approach 2:
The timing controller dynamically changes the delay value parameter of the clock signal based on feedback information about RC delays. By adjusting this timing parameter, the system compensates for signal propagation delays and ensures proper synchronization between data and gate signals
2Illumination intensity
If the timing of gate signals is adjusted to compensate for RC delays, then luminance is improved, but the system requires feedback mechanisms and timing control adjustments increasing device complexity
Solution Approach 1:
The gate driver performs self-diagnosis by comparing its own output gate signal with the input data signal to generate feedback about timing mismatch. This self-service capability allows the system to automatically detect and report timing issues without requiring external monitoring equipment
Solution Approach 2:
The patent combines multiple functions into the gate driver: it not only generates gate signals but also compares signals, generates feedback, and works with the timing controller to adjust timing. This merging of functions reduces the need for separate dedicated components for each task
Data Source
AI summary
A display device includes a display panel, and the display panel includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels connected to the plurality of data lines and the plurality of gate lines. A data driver provides data signals to the plurality of data lines. A gate driver sequentially generates gate signals corresponding to a start pulse using a clock signal, and provides the gate signals to the plurality of gate lines. A timing controller provides the clock signal and the start pulse to the gate driver. The gate driver compares a data signal provided to a first data line among the plurality of data lines and at least one of the gate signals to generate a feedback signal. The timing controller sets a delay value of the clock signal based on the feedback signal.