LCD Panel Charge Sharing via Reused Gate Line Signals
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Solution Overview
Problem
Conventional liquid crystal display (LCD) panels face challenges in efficiently managing charge distribution across sub-pixel areas, leading to limitations in viewing angles and display performance due to the lack of effective charge-sharing mechanisms.
Innovation Solution
The implementation of a liquid crystal display panel with each pixel comprising a first and second sub-pixel area, each equipped with a storage capacitor, where a first gate line charges both capacitors, and a second gate line shares charge from the second capacitor to a third capacitor, allowing for varied gate line signal timing and width to enhance charge distribution and sub-pixel intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional LCD panels use standard gate line signaling without charge sharing, then the device complexity is low, but the viewing angle and display performance are limited
Solution Approach 1:
The pixel is divided into first and second sub-pixel areas, each with its own storage capacitor (first and second capacitors). This segmentation allows independent charge management for each sub-pixel area, enabling improved viewing angles and display performance through differential charge control while maintaining manageable device complexity
Solution Approach 2:
The first gate line signal serves multiple functions: it activates the first switching element to charge the first capacitor, activates the second switching element to charge the second capacitor, and later serves as the second gate line signal for charge sharing. This multi-functionality reduces the need for additional dedicated control lines, maintaining ease of manufacture while enabling advanced display capabilities
2Adaptability or versatility
If a charge sharing mechanism is implemented with additional gate lines and capacitors, then viewing angle and display performance improve, but the device complexity increases
Solution Approach 1:
The first gate line signal is reused as the second gate line signal for charge sharing operations. By merging these control functions into a single signal source, the patent reduces the number of independent control lines needed, thereby limiting the increase in device complexity while still implementing the beneficial charge sharing mechanism for improved viewing angles and performance
Solution Approach 2:
The charge sharing mechanism uses the existing first gate line signal to control the third switching element, allowing the system to perform charge redistribution using its own existing control infrastructure. This self-service approach minimizes the need for external additional control signals, keeping device complexity in check while achieving enhanced display capabilities
3Device complexity
If gate line signals are provided with fixed width and timing, then the device complexity is low, but the charge distribution efficiency is limited
Solution Approach 1:
The patent enables dynamic adjustment of gate line signal timing and width. The first gate line signal can be extended to serve as the second gate line signal, and the third switching element can be controlled at different times relative to the first and second switching elements. This dynamic control allows optimization of charge distribution efficiency for different display conditions while maintaining manageable signal control complexity through systematic timing relationships
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
This approach broadens viewing angles by slightly differing the tilt direction of liquid-crystal molecules, improving display performance and efficiency in charge management across sub-pixels.
Implementation Method 1
a first gate line for providing a first gate line signal for charging the first and second storage capacitors
Implementation Method 2
a second gate line for providing a second gate line signal for removing part of the charges in the second storage capacitor to a third capacitor
Implementation Method 3
broadens viewing angles by slightly differing the tilt direction of liquid-crystal molecules
Data Source
AI summary
A LCD panel in which a pixel has a first sub-pixel area and a second sub-pixel area, each area having a storage capacitor. Each pixel has a first gate line for providing a first gate-line signal for charging the first and second storage capacitors, and a second gate line for providing a second gate-line signal for removing part of the charges in the second storage capacitor to a third capacitor after the first gate-line signal has passed. The width of the first and second gate-line signals and their timing can be varied so that the first gate-line signal provided to a row can be used as the second gate-line signal to one of the preceding rows. In some embodiments, a pixel in each row has a duplicate pixel arranged to similarly receive the first and second gate-line signals, but data signals are received from different data lines.