Driving Controller Impedance Adjustment for Uniform TFT-LCD Voltages
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Solution Overview
Problem
In TFT-LCD panels, the high resistance of glass boards leads to significant voltage drops, necessitating multiple flexible printed circuit boards to maintain consistent input voltages for driving controllers, increasing manufacturing costs. This requires minimizing the use of flexible printed circuit boards while ensuring uniform input voltages across driving controllers.
Innovation Solution
A driving circuit design featuring a power supply, conductive paths, and driving controllers with adjustable resistance units, allowing for internal impedance adjustment to maintain consistent voltages even with a single flexible printed circuit board, using resistance adjustment units connected between conductive paths and internal circuits to equalize voltages across driving controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple flexible printed circuit boards are employed to maintain consistent input voltages, then voltage consistency is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the electrical parameters of the conductive paths by introducing adjustable resistance units that can modify the impedance characteristics. This allows compensation for voltage drops without requiring multiple flexible printed circuit boards, thereby maintaining voltage consistency while reducing manufacturing costs.
Solution Approach 2:
The patent introduces resistance adjustment units as intermediary components between the power supply and the driving controllers. These units act as mediators to regulate and equalize voltages across different conductive paths, eliminating the need for multiple expensive flexible printed circuit boards.
2Reliability
If the resistance of conductive paths is high, then voltage drop increases, but using multiple flexible printed circuit boards to compensate increases manufacturing cost
Solution Approach 1:
The patent implements dynamically adjustable resistance units that can be tuned to optimize voltage distribution. This dynamic adjustment capability allows the system to compensate for high conductive path resistance without adding static structural complexity like multiple flexible printed circuit boards.
Solution Approach 2:
By changing the resistance parameters of the conductive paths through adjustable resistance units, the system can optimize voltage distribution along the conductive paths, compensating for inherent high resistance without increasing device complexity.
3Ease of manufacture
If a single flexible printed circuit board is used to reduce cost, then manufacturing cost decreases, but voltage consistency across driving controllers deteriorates
Solution Approach 1:
The resistance adjustment units serve as intermediary components that actively regulate voltage distribution across the single flexible printed circuit board. They compensate for voltage drops in different conductive paths, ensuring consistent input voltages to all driving controllers while maintaining cost-effectiveness.
Solution Approach 2:
The patent incorporates feedback mechanisms through the adjustable resistance units that monitor and compensate for voltage variations. This feedback control ensures that even with a single flexible printed circuit board, all driving controllers receive consistent input voltages.
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 ensures consistent working voltages across driving controllers, reducing the need for multiple flexible printed circuit boards and lowering manufacturing costs while maintaining efficient voltage distribution, thereby optimizing the TFT-LCD panel's performance.
Implementation Method 1
The resistance value of the resistance adjustment unit is adjustable to equalize the internal voltages of the driving controllers
Data Source
AI summary
A driving circuit includes a power supply, a plurality of conductive paths and a plurality of driving controller. The power supply is configured for providing a predetermined voltage. The conductive paths are connected to the power supply to receive the predetermined voltage. The driving controllers are connected to the conductive paths correspondingly. A first driving controller of the driving controllers has a first internal circuit configured for employing an internal voltage to perform functions provided by the first driving controller, and a resistance adjustment unit. The resistance adjustment unit is connected between a special conductive path and the first internal circuit. The second driving controller has a second internal circuit configured for employing a second internal voltage to perform functions provided by the second driving controller. A resistance value of the resistance adjustment unit is adjustable to make the first internal voltage same to the second internal voltage.