Driver Signal Control Circuit for Display Panel RC Delay
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Solution Overview
Problem
Conventional one-side driving methods for display panels suffer from RC delay issues, leading to uneven display effects and increased production costs due to the need for frequent adjustments in resistor resistance during batch production.
Innovation Solution
A driver signal control circuit comprising a timing controller, gate voltage shaping controller, field-effect transistors, and resistors, which adjusts the timing of control signals to control the chamfering process, allowing for consistent display effects without changing resistor values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the resistance of resistor R1 is adjusted to achieve proper chamfering speed and depth, then the display effect of the display panel is optimized, but the production cost increases due to constant adjustments during batch fabrication
Solution Approach 1:
The patent replaces the static resistor R1 with a dynamic control mechanism using FETs and timing controllers. The chamfering speed and depth are controlled by adjusting the timing of control signals (first control signal and second control signal) rather than changing resistor values. This dynamic approach allows the same hardware to adapt to different production requirements through software/timing adjustments, eliminating the need for physical resistor adjustments during batch fabrication and reducing production costs.
Solution Approach 2:
The patent changes the control parameter from resistance value to timing duration. Instead of adjusting the resistance of resistor R1 to achieve proper chamfering, the system uses a timing controller to adjust the duration of control signals that control FET conduction. This parameter change allows for flexible adjustment of chamfering speed and depth without physical component changes, maintaining consistent production costs across batches while achieving optimal display effects.
2Device complexity
If one-side driving method is used for display panel, then the display driver signal transmission is simplified, but RC delay causes uneven display effects between left and right sides
Solution Approach 1:
The patent applies preliminary action by implementing the chamfering process before the main display signal is applied to the panel. The timing controller generates control signals that activate FETs to pull up or discharge the display driver signal through resistor R1 in a controlled manner before the actual display operation. This preliminary chamfering action compensates for the RC delay effects, ensuring uniform display across the panel while maintaining the simplicity of one-side driving architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances display effects by controlling chamfering speed and depth through signal timing adjustments, reducing production costs by eliminating the need for constant resistor adjustments across different production batches.
Implementation Method 1
The control signal controls conduction and termination of a first field-effect transistor (FET) Q1 and a second FET Q2 after passing a gate voltage shaping controller
Implementation Method 2
When the first FET Q1 is turned off and the second FET Q2 is conducted, the VGHM discharges through a resistor R1
Data Source
AI summary
A driver signal control circuit for a display panel is proposed. A timing controller is connected to an input terminal of a gate voltage shaping controller and a first FET. A first output terminal of the gate voltage shaping controller is connected to a gate of the first FET. A drain of the first FET is connected to the output terminal of the control circuit. A second output terminal of the gate voltage shaping controller is connected to a gate of the second FET, and a source of the second FET is connected to the output terminal of the control circuit. A second terminal of the discharge passage is connected to an output terminal of the control circuit. The control circuit effectively prevents the production costs when display panels with different production batches are fabricated using different fabrication processes.