LCD Driving Device Output Switching for Source Line Potential Setting
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Solution Overview
Problem
Conventional driving devices for LCD panels with more source lines than pixel electrodes fail to effectively set potentials for all source lines, particularly when the number of output terminals is greater than the number of source lines, leading to unconnected central region output terminals and inefficient power management.
Innovation Solution
A driving device with an output switching section and output means that connects input terminals to specific output terminals based on control signals, allowing unconnected output terminals in the central region to remain unconnected, thereby optimizing potential setting across the source lines and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of output terminals is greater than the number of source lines, then the driving device can potentially drive more source lines, but the central region output terminals remain unconnected leading to wasted resources and increased power consumption
Solution Approach 1:
The patent extracts and identifies the unconnected central region output terminals as non-functional elements. By recognizing which output terminals are actually connected to source lines and which are not, the system can exclude the unconnected terminals from operation, thereby reducing unnecessary power consumption while maintaining the driving capability for the actual source lines.
2Device complexity
If conventional driving devices are used with more source lines than pixel electrodes, then the device structure is established, but the unconnected output terminals in the central region cause inefficient power management
Solution Approach 1:
The patent applies local quality by differentiating the functionality of different output terminals. Instead of treating all output terminals uniformly, it identifies the central region terminals as having a different status (unconnected) compared to the peripheral terminals (connected to source lines). This allows the system to manage power consumption differently for different parts of the device, turning off or idle-ing the unconnected central terminals while keeping the connected peripheral terminals active.
3Ease of operation
If output terminals are connected to source lines to set potentials, then the LCD panel can be driven, but consecutive arrangement of pixels of the same polarity causes crosstalk
Solution Approach 1:
The patent employs dynamics by making the potential setting dynamic rather than static. Instead of fixed polarity assignments, the system dynamically switches between positive and negative potentials for adjacent pixels based on the display requirements. This dynamic potential switching prevents consecutive pixels of the same polarity, thereby eliminating crosstalk while maintaining ease of operation for LCD panel driving.
Data Source
AI summary
A driving device drives a liquid crystal display panel in which the number of source lines is by one larger than the number of columns of pixel electrodes and in which the columns of pixel electrodes are arranged between the source lines. The driving device has a configuration in which potential output terminals, in a central region, are not connected to any source line. A voltage follower is connected to an output switching section. Additionally, potential output terminals are connected through switches to input terminals, respectively. The switch connects a first terminal to a second terminal with control signal at a high level and connects the first terminal to a third terminal with at a low level.