QRD Display Device Staggered Gate Lines Data Line Reduction
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Solution Overview
Problem
Existing display devices using the Double Rate Driving (DRD) scheme face challenges in reducing power consumption and vertical line defects, while Quad Rate Driving (QRD) schemes struggle to achieve equivalent performance without increasing the number of data lines.
Innovation Solution
A QRD-based display device with a new rendering structure that uses staggered gate lines and data lines to activate four sub-pixels with a single data line, employing oxide thin-film transistors for improved mobility and reduced charging time, and implementing a horizontal 2-dots inversion scheme to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of data lines is reduced to 1/4 using QRD scheme, then device complexity is reduced, but manufacturing precision and image quality deteriorate
Solution Approach 1:
The display panel is divided into four sub-pixels that share a common data line, with each sub-pixel controlled by distinct gate lines (GL1-GL4). This segmentation allows independent control of sub-pixels while reducing the total number of data lines required, thereby reducing device complexity while maintaining image quality through precise gate-level control
Solution Approach 2:
The patent transitions from conventional data line organization to a four-sub-pixel sharing structure, adding a dimensional aspect to data line utilization. By organizing sub-pixels in groups of four that share data lines, the system achieves more efficient data line usage without compromising the precision needed for high-quality display
2Device complexity
If QRD scheme is implemented without new rendering structure, then device complexity is reduced, but reliability and performance deteriorate
Solution Approach 1:
The patent implements dynamic control of sub-pixels through four distinct gate lines (GL1-GL4) that can be independently activated. This dynamic gate control mechanism allows flexible and reliable manipulation of sub-pixel groups, ensuring high reliability in the QRD implementation while maintaining reduced device complexity
Solution Approach 2:
The patent changes the control parameters by introducing four distinct gate lines for controlling sub-pixels that share data lines. This parameter change enables precise control over sub-pixel activation patterns, ensuring reliable performance in the QRD scheme while maintaining the reduced data line configuration
3Device complexity
If conventional DRD scheme with two-dot inversion is used, then device complexity is reduced, but use of energy increases
Solution Approach 1:
The display is segmented into sub-pixel groups controlled by four gate lines, allowing for more efficient inversion patterns. This segmentation enables the horizontal 2-dots inversion scheme to be implemented more effectively, reducing the power consumption associated with inversion operations while maintaining the reduced data driver configuration of the DRD scheme
4Device complexity
If QRD scheme is implemented, then device complexity is reduced, but manufacturing precision and aperture ratio worsen
Solution Approach 1:
Four sub-pixels are merged to share a common data line, reducing the total number of data lines required. This merging is compensated by the precise staggered arrangement of gate lines, which maintains manufacturing precision and aperture ratio by optimizing the spatial organization of the pixel structure
5Speed
If oxide thin-film transistors are used, then speed improves, but use of energy increases
Solution Approach 1:
The patent employs periodic inversion patterns (horizontal 2-dots inversion) that work synergistically with the high-speed oxide TFTs. This periodic action allows the high mobility of oxide TFTs to be utilized effectively for rapid pixel charging while the inversion scheme reduces the average power consumption by periodically reversing polarities to minimize DC offset and energy waste
Data Source
AI summary
Disclosed is a display device having a QRD-based rendering structure capable of achieving the same performance as a display device using a conventional DRD scheme while performing a horizontal 2-dots inversion. Further, disclosed is a QRD-based display device with a new rendering structure to achieve a performance equivalent to that of an existing DRD scheme.