Timing Controller Start Signal Edge Synchronization in Display Panels
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Solution Overview
Problem
Display devices often generate abnormal gate control signals due to inaccuracies in timing, leading to synchronization issues between scanning and gray scale signals, resulting in suboptimal image display.
Innovation Solution
A display panel design that includes a timing controller generating a gate control signal with a start signal, a first clock signal, and a second clock signal, where the rising and falling edges of the start signal are accurately synchronized within the frame cycle, ensuring precise timing for the gate driver circuit to provide scanning signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the timing controller generates gate control signal based on data enable signal within active cycle, then the synchronization between scanning and gray scale signals is improved, but the risk of abnormal gate control signal generation due to timing inaccuracies increases
Solution Approach 1:
The patent applies preliminary action by generating the start signal before the active cycle begins. Specifically, the start signal is generated within a time interval formed by rising edges of data enable signals in the (N-1)th frame cycle, which is before the Nth frame cycle's active cycle starts. This advance preparation ensures that the gate driver circuit is properly initialized and synchronized before actual data transmission begins, preventing timing inaccuracies and abnormal signal generation.
Solution Approach 2:
The patent introduces an intermediary mechanism by using a specifically designed time interval based on data enable signal rising edges as a reference point for start signal generation. This intermediary time interval acts as a buffer and synchronization reference between the previous frame cycle and the current frame cycle, ensuring accurate timing alignment without direct dependence on the current active cycle's data enable signals.
2Measurement precision
If the rising and falling edges of start signal are generated within the time interval formed by data enable signal edges, then the timing precision is improved, but the device complexity increases
Solution Approach 1:
The timing controller utilizes the existing data enable signal edges from the previous frame cycle to automatically determine the time interval for start signal generation. The system serves itself by using its own operational signals (data enable signals from the previous frame) as the reference for generating the start signal, eliminating the need for external timing references or complex additional circuitry.
Solution Approach 2:
The patent changes the timing parameter reference from the current frame's active cycle to the previous frame's data enable signal edges. By shifting the reference point in time (using (N-1)th frame data enable signals to control Nth frame start signal), the system achieves precise timing control without requiring complex real-time synchronization circuits.
Data Source
AI summary
Provided is a display panel. The display panel includes multiple scanning lines, a gate driver circuit, and a timing controller. The timing controller is configured to: receive multiple data enable signals, generate a gate control signal, and provide the gate control signal for the gate driver circuit. The gate control signal includes a start signal, a first clock signal and a second clock signal. The multiple data enable signals are only within the active cycle. The timing controller is configured to generate a rising edge and a falling edge of the start signal within a time interval formed by a rising edge and a falling edge of a first data enable signal in the Nth frame cycle.