Data Driver Feedback Timing Control for Display Gate Voltage Delays
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Solution Overview
Problem
Display devices face defects in image quality due to timing discrepancies between gate and data voltages, which can be exacerbated by temperature changes, leading to delayed gate voltages and improper charging of pixels.
Innovation Solution
A display device with a data driver that receives gate voltage as feedback, allowing it to control the output timing of data voltages in real-time based on the feedback voltage, thereby synchronizing with varying gate voltages and compensating for temperature-induced delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate voltage is applied sequentially through gate lines, then the switching transistors are turned on in sequence, but the gate voltage may be delayed due to temperature changes, causing timing discrepancies with data voltage
Solution Approach 1:
The patent implements a feedback mechanism where the gate voltage is fed back to the data driver. The data driver receives the gate voltage through a feedback line and uses it to adjust the output timing of data voltages. This closed-loop feedback allows the system to detect and compensate for gate voltage delays caused by temperature changes, ensuring synchronous operation between gate and data voltages and preventing display quality defects.
2Reliability
If the data voltage is output at a fixed timing, then the display operation is simple, but timing discrepancies with gate voltage cause image quality defects
Solution Approach 1:
The patent transforms the fixed timing output into a dynamic timing control mechanism. The data driver adjusts the output timing of data voltages based on the feedback gate voltage in real-time. This dynamic adjustment allows the system to adapt to temperature-induced variations in gate voltage timing, maintaining image quality without requiring complex external synchronization mechanisms.
3Adaptability or versatility
If the gate voltage varies due to temperature changes, then the display device adapts to environmental conditions, but the timing difference between gate and data voltages causes pixel charging issues
Solution Approach 1:
The feedback line connected to the gate line provides real-time information about gate voltage variations to the data driver. The data driver uses this feedback to dynamically adjust data voltage output timing, ensuring precise synchronization even when temperature causes gate voltage variations. This feedback mechanism maintains timing precision while allowing the system to adapt to temperature changes.
Data Source
AI summary
A display device includes a display panel including pixels, gate lines electrically connected to the pixels, and data lines electrically connected to the pixels, a gate driver which sequentially outputs gate voltages to the gate lines, and a data driver which receives at least a portion of the gate voltages from the display panel as a feedback voltage, determines an output timing of data voltages based on the feedback voltage, and outputs the data voltages to the data lines based on the output timing.