Display Data-Line Voltage Grading for Power Rail Stability
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Solution Overview
Problem
The large impedance and absence of capacitance on glass substrates in display devices lead to significant instantaneous power draw, affecting the stability of power supplies and ground terminals, particularly during large load changes.
Innovation Solution
A driving method that predicts voltage changes on data lines, obtains trace resistance values, and adjusts data voltages through grading when necessary to stabilize power supply and ground terminal stability, without additional circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glass substrate is used for display device, then manufacturing cost is reduced and design flexibility is improved, but instantaneous power draw increases and power supply stability deteriorates
Solution Approach 1:
The patent applies preliminary action by predicting voltage changes before they occur and pre-adjusting data voltages through grading. The system calculates expected voltage changes based on load transition predictions and proactively adjusts voltages to prevent large instantaneous power draws, thereby maintaining power supply stability while using glass substrate technology.
Solution Approach 2:
The patent changes the parameter of data voltage through grading adjustment. By modifying voltage levels dynamically based on predicted load changes and trace resistance values, the system controls instantaneous power draw while maintaining display functionality on glass substrate platforms.
2Speed
If data voltage changes rapidly to respond to load changes, then response speed is improved, but instantaneous power draw increases and ground stability deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting data voltage levels based on predicted load changes and trace resistance. The system modifies voltage parameters in a controlled manner through grading, achieving responsive voltage adjustment while preventing excessive instantaneous power draws that would destabilize the ground terminal.
Solution Approach 2:
The patent implements feedback by continuously monitoring actual voltage changes and comparing them with predicted values. Based on this feedback, the system adjusts data voltages through grading to maintain optimal performance while controlling power draw, ensuring ground stability is preserved during dynamic operations.
Data Source
AI summary
A driving method for a display device and a display device are disclosed. The driving method includes: determining, based on a voltage change value and a resistance value whether to perform grading adjustment on a target data voltage pre-input to a data line; adjusting, according to predetermined grading rules, a data voltage on the data line by grading when the voltage change is greater than or equal to a predetermined value, and inputting the graded data voltages to the data lines respectively to drive the display panel; outputting, the target data voltage pre-input directly to the data line to drive the display panel when the voltage change value is less than the preset value.