Self-Adjusting LCD Drive Force via Variable Resistor Feedback
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Solution Overview
Problem
Conventional LCD driving apparatuses have a fixed drive force, making them unsuitable for different-sized LCD panels with varying capacitance and resistance, requiring separate driving apparatuses for each panel.
Innovation Solution
An LCD driving apparatus comprising a variable resistor, comparison unit, and adjustment unit that self-adjusts the output current based on voltage comparisons with a predetermined value to ensure proper charging of liquid crystal and storage capacitors within a fixed period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed drive force is used in the LCD driving apparatus, then the apparatus is simple to manufacture, but it cannot adapt to different LCD panel sizes with varying capacitance and resistance
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed drive force with a variable drive force that can dynamically adjust according to the LCD panel's characteristics. The driving apparatus includes a variable resistor that can change its resistance value based on feedback from the LCD panel's voltage and current measurements, enabling the system to adapt to different panel sizes and capacitance values while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent implements feedback by measuring the actual voltage and current of the LCD panel and using this information to adjust the drive force. The comparison unit compares the measured voltage with a reference voltage, and the adjustment unit modifies the resistor value accordingly. This feedback mechanism enables the driving apparatus to automatically adapt to different LCD panel characteristics without requiring complex manual configuration.
2Reliability
If separate driving apparatuses are provided for each LCD panel size, then each panel can be optimized for its specific capacitance and resistance, but it increases manufacturing complexity and inventory requirements
Solution Approach 1:
The patent applies universality by designing a single driving apparatus that can serve multiple LCD panel sizes and configurations. The variable resistor and feedback mechanism enable the same apparatus to adapt to different capacitance and resistance values, eliminating the need for separate dedicated driving circuits for each panel type. This reduces manufacturing complexity and inventory requirements while maintaining reliable charging performance across different panels.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the resistance value of the variable resistor based on the LCD panel's electrical characteristics. The adjustment unit modifies the resistor parameter in response to feedback from voltage and current measurements, allowing the driving apparatus to optimize charging parameters for each specific panel without requiring separate hardware designs. This parameter-based adaptation maintains manufacturing simplicity while ensuring reliable performance.
3Productivity
If the charging current is adjusted to match different LCD panel capacitances, then the voltage can be charged to the predetermined value within the requested period, but the drive force must be precisely controlled for each panel
Solution Approach 1:
The patent implements self-service by enabling the driving apparatus to automatically adjust its own drive force without external intervention. The feedback mechanism continuously monitors the panel's voltage and current, and the adjustment unit autonomously modifies the resistor value to maintain optimal charging conditions. This self-adjusting capability allows the system to achieve high charging speed for different panel capacitances while eliminating the need for manual configuration or complex external control, thereby improving ease of operation.
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
Enables the LCD driving apparatus to automatically adjust its drive force, accommodating different LCD panel sizes by dynamically adjusting the output current to achieve the desired voltage, thus improving flexibility and compatibility across various panel sizes.
Implementation Method 1
a variable resistor 21, a comparison unit 22 and an adjustment unit 23. The variable resistor 21 is coupled to a data line of an LCD panel for receiving an input voltage and outputting an output current to the data line of the LCD panel
Implementation Method 2
The comparison unit 22 is coupled to the data line of the LCD panel for receiving a voltage of a display unit at the data line and comparing the voltage with a predetermined voltage for generating a comparing result
Implementation Method 3
The adjustment unit 23 is for adjusting the variable resistor 21 according to the comparing result to change the value of the output current
Implementation Method 4
providing data voltages at the data lines to charge the storage capacitors Cs and the liquid crystal capacitors Clc through the thin-film transistors in order to deflect the liquid crystal molecule
Implementation Method 5
the drains of the thin-film transistors are connected to the storage capacitors Cs
Data Source
AI summary
The invention provides an LCD driving apparatus which can self-adjust its drive force for different LCD panels. The LCD driving apparatus comprising: a variable resistor coupled to a data line of an LCD panel for receiving an input voltage, and then outputting an output current to the data line of said LCD panel; a comparison unit coupled to the data line of the LCD panel for receiving a voltage of a display unit of the data line, and comparing the voltage with a predetermined voltage for generating a comparing result; and an adjustment unit for adjusting the variable resistor in accordance with the comparing result for changing the value of the output current.