Common Electrode Driving Module for Multi-Mode LCD Panels
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Solution Overview
Problem
Conventional common electrode driving modules in LCDs can only provide a single common voltage, which is insufficient to support various display modes such as 2D@60 Hz, 2D@120 Hz, and 3D@120 Hz or 3D@240 Hz, as each mode requires different charging times and voltages.
Innovation Solution
A common voltage driving module comprising a voltage-division resistor string, a switch selecting unit, and a mode switching unit, which adjusts the number of resistors and amplifies the input voltage to generate specific common voltages for different display modes by controlling MOSFET switches based on control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional common electrode driving module is used, then the structure is simple, but it can only provide one common voltage and cannot support multiple display modes
Solution Approach 1:
The patent implements dynamic switching capability in the common electrode driving module by introducing a mode switching unit that can dynamically select between different common voltage outputs based on the current display mode. This allows the module to adapt its behavior in real-time, transitioning from a static single-voltage design to a dynamic multi-voltage design that supports various display modes including 2D@60Hz, 2D@120Hz, and 3D modes.
Solution Approach 2:
The common electrode driving module is segmented into multiple functional units: a common voltage generation unit that produces multiple distinct common voltages (first common voltage for 2D@60Hz, second common voltage for 2D@120Hz, third common voltage for 3D modes), and a mode switching unit that selects between them. This segmentation allows each unit to be optimized for its specific function while collectively achieving multi-mode support.
2Reliability
If different common voltages are provided for different display modes, then the display performance is optimized, but the driving module complexity increases
Solution Approach 1:
The common electrode driving module is designed with multi-functionality to support multiple display modes through a unified structure. The common voltage generation unit generates multiple different common voltages suitable for various display modes (2D@60Hz, 2D@120Hz, 3D), and the mode switching unit intelligently selects the appropriate voltage based on the current mode, allowing a single module to perform multiple functions that would otherwise require separate dedicated circuits.
3Duration of action of moving object
If multiple common voltages are generated, then charging time requirements for different modes are met, but the circuit complexity increases
Solution Approach 1:
The patent changes the voltage parameter by generating multiple distinct common voltage levels (first common voltage, second common voltage, third common voltage) corresponding to different display modes. Each voltage level is specifically optimized for the charging time requirements of its associated mode, allowing the system to meet diverse timing requirements through parameter variation rather than requiring complex external circuitry.
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 panel to provide optimal image display in multiple modes by generating distinct common voltages for each display mode, enhancing the overall performance of the LCD panel.
Implementation Method 1
a voltage-division resistor string, configured to receive a voltage source and divide the voltage source to obtain an input voltage
Implementation Method 2
the switch is a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), wherein a gate of the MOSFET receives the control signal, a source of the MOSFET is electrically connected to a ground, and a drain of the MOSFET is electrically connected to the voltage-division resistor string
Implementation Method 3
a voltage amplifying unit, configured to amplify the input voltage to generate the common voltage and provide the common voltage to the common electrode
Data Source
AI summary
A common electrode driving module is provided to provide different common voltages according to different display modes of an LCD panel. The common electrode driving module includes a voltage-division resistor string configured to obtain an input voltage, a switch selecting unit electrically connected to the voltage-division resistor string configured to change an voltage level of the input voltage by controlling on/off states of the switches to change a number of resistors contained in the voltage voltage-division resistor string, a voltage amplifying unit configured to amplify the input voltage to generate the common voltage and provide the common voltage to the common electrode, and a mode switching unit, configured to provide a control signal to the switch selecting unit to control the on/off states of the at least one switch according to a current display mode such that the common voltage corresponding to the current display mode is obtained.