N-th Stage Driving Module Common Control Node Bidirectional Scanning
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Solution Overview
Problem
Conventional bidirectional scanning driving circuits for LCDs require a large area and complex layouts, which increases the size and power consumption of LCD devices, and there is a need to minimize signal interference and simplify the control circuit layout to support bidirectional scanning effectively.
Innovation Solution
An n-th stage driving module with a common control node is introduced, where the control node is shared among output units, allowing for reduced area usage and efficient bidirectional scanning by charging and discharging the control node using forward and reverse input units to produce scanning signals sequentially, thereby simplifying the circuit layout and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional bidirectional scanning driving circuit is used, then the scanning function is achieved, but the driving circuit area increases and layout becomes complex
Solution Approach 1:
The patent merges the control nodes of multiple output units into a single shared control node. This consolidation reduces the number of separate control circuits needed, thereby reducing the overall driving circuit area while maintaining bidirectional scanning functionality. The shared control node is charged or discharged by input units to generate scanning signals for multiple output units simultaneously.
Solution Approach 2:
The shared control node serves multiple output units, making it a universal control element that performs the function of what would traditionally require separate control nodes for each output unit. This multi-functionality reduces circuit complexity and area while enabling bidirectional scanning across multiple channels.
2Adaptability or versatility
If separate control nodes are used for each output unit, then each unit can be independently controlled, but the circuit layout becomes complex and area increases
Solution Approach 1:
Multiple control nodes are merged into a single shared control node that serves all output units. This consolidation simplifies the circuit layout by reducing the number of control nodes from multiple separate elements to one universal element, thereby reducing layout complexity while maintaining independent control capability through selective charging and discharging operations.
3Measurement precision
If multiple input units are used for each output unit, then precise control is achieved, but power consumption increases
Solution Approach 1:
Multiple input units that would traditionally serve separate output units are merged into shared input units that control the common control node. This reduces the total number of input units from multiple per output unit to shared resources, thereby reducing power consumption while maintaining precise control through selective charging and discharging of the shared control node.
Solution Approach 2:
The control node is charged by input units when scanning signals need to be generated, and then discharged after use. This temporary use and subsequent discharge of the control node allows precise control when needed while recovering energy by discharging, thereby reducing continuous power consumption compared to having always-active separate control circuits.
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 n-th stage driving module effectively reduces the area of the driving circuit, supports bidirectional scanning, and decreases power consumption by sharing the control node among output units, simplifying the circuit layout and reducing unnecessary power usage through efficient charging and discharging mechanisms.
Implementation Method 1
the plurality of output units are all coupled to a control node... The plurality of output units receive the plurality of clock signals. When the forward input unit is charging the output unit, a plurality of forward scanning signals are produced and output sequentially
Data Source
AI summary
An n-stage driving module with a common control node according to the present invention is revealed. The n-stage driving module comprises a plurality of output units, a forward input unit and a reverse input unit. The output units are all coupled to a control node to share the control node. The output units output forward scanning signals sequentially according to the charge of the control node when the control node is charged by the forward input unit. The output units output reverse scanning signals sequentially according to the charge of the control node when the control node is charged by the reverse input unit. Thus, the present invention is provided to output forward or reverse scanning signals from the output units by sharing the control node so as to decrease the circuit area in the n-stage driving module.