Display Row Driving with Selectors for Flexible Scan Order
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Solution Overview
Problem
Existing display technologies face challenges with multi-functional row drivers due to the unchangeable scanning order of scan lines, excessive driving chip pins, and encapsulation issues.
Innovation Solution
A driving method and display device utilizing selectors to connect multiple scan lines to a single pin of the driving chip, allowing arbitrary scanning order and reducing chip pins, with features like grayscale voltage sorting and time-sharing driving to minimize parasitic capacitance and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If one pin of the driving chip is correspondingly connected to one scan line, then the scanning order is fixed and simple to control, but the number of driving chip pins increases excessively
Solution Approach 1:
The patent divides the scan line control into multiple segments by introducing selector switches. Each selector can independently control which scan line receives the scan signal from a single pin, effectively segmenting the control function across multiple scan lines while reducing the total number of pins required on the driving chip.
Solution Approach 2:
A single pin on the driving chip is made universal by connecting it to multiple scan lines through selectors. The same pin can sequentially or selectively drive different scan lines, making one pin serve multiple functions and reducing the overall pin count while maintaining full scan line control capability.
2Adaptability or versatility
If the scanning order is changed arbitrarily, then the display flexibility is improved, but the control complexity increases
Solution Approach 1:
The patent introduces dynamic control capability through selector switches that can be programmed to change their connection states. This allows the scanning order to be dynamically adjusted without permanently rewiring the system, achieving flexibility while keeping the base structure relatively simple.
Solution Approach 2:
Selector switches serve as intermediary components between the driving chip pins and scan lines. These intermediaries provide a flexible routing layer that enables arbitrary scanning orders without requiring direct complex connections between every pin and every scan line, thus managing complexity through modular intermediate control elements.
3Quantity of substance
If multiple scan lines are connected to one pin through selectors, then the number of driving chip pins is reduced, but parasitic capacitance and power consumption increase
Solution Approach 1:
The patent employs periodic scanning where each scan line is activated in sequence rather than simultaneously. This periodic action ensures that at any given time, only one scan line is actively driven through the selector, minimizing the total parasitic capacitance loaded on the driving chip pin and reducing power consumption compared to simultaneous driving of multiple lines.
Solution Approach 2:
The system discards the inactive scan line connections by routing them through selectors that disconnect them from the active driving pin. This allows the parasitic capacitance of non-active scan lines to be effectively removed from the driving circuit, reducing the total capacitive load and associated power consumption while maintaining the ability to recover and activate any scan line when needed.
Data Source
AI summary
A driving method of a display device, and a display device are disclosed. The display device includes a driving chip and multiple selectors, the driving chip including a first pin connected to at least four scan lines through one selector, and a second pin connected to a data line. The driving method includes: generating a row initialization signal for driving at least four scan lines and outputting it to the selector via the first pin; controlling, by the selector, a corresponding output terminal to output the row initialization signal to the corresponding scan line for driving according to the control signal; where the row initialization signal is generated based on original scan signals of the at least four scan lines connected to the selector. The row initialization signal includes at least four scan cycles, each scan cycle being used to scan one respective scan line.