LCD Power Supply Lines Reduce Data Line Count
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Solution Overview
Problem
The high manufacturing cost of liquid crystal displays is increased by the number of data lines required for adequate display quality, which also leads to potential deterioration due to irregular movement of liquid crystal molecules, affecting contrast ratio, viewing angle, and response speed.
Innovation Solution
A liquid crystal display design with reduced data lines, utilizing pairs of power source supply lines and specific pixel electrode configurations to apply voltages with different polarities, ensuring high contrast ratio, wide viewing angle, and fast response speed while minimizing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of data lines is increased to provide adequate display quality, then display quality (contrast ratio, viewing angle, response speed) is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the functions of data lines and power source supply lines by having power source supply lines carry both data signals and power voltages. This merging reduces the total number of lines required, thereby reducing manufacturing cost while maintaining display quality through adequate voltage supply to pixel electrodes.
Solution Approach 2:
The power source supply lines are designed to perform multiple functions: transmitting data signals to pixel electrodes and simultaneously providing power voltages. This multi-functionality eliminates the need for separate dedicated power lines, reducing overall line count and manufacturing complexity while ensuring adequate display performance.
2Ease of manufacture
If the number of data lines is reduced to lower manufacturing cost, then manufacturing cost decreases, but display quality deteriorates due to irregular liquid crystal molecule movement
Solution Approach 1:
By merging data signal transmission and power supply functions into the same lines, the patent reduces the number of lines needed while ensuring that pixel electrodes receive adequate power voltages. This prevents irregular liquid crystal molecule movement that would otherwise occur with insufficient voltage supply, thereby maintaining display quality despite reduced line count.
Solution Approach 2:
The patent applies different voltage levels to different segments of the same line structure. Power source supply lines carry higher voltage levels for power supply, while data lines carry lower voltage data signals. This parameter differentiation allows the system to maintain both power supply adequacy and data signal integrity with fewer lines, preventing display quality deterioration.
3Reliability
If pairs of power source supply lines with different polarities are applied, then liquid crystal molecule movement is controlled (preventing irregular movement), but device complexity increases
Solution Approach 1:
The patent employs asymmetric voltage application where pairs of power source supply lines carry voltages of different polarities. This asymmetric configuration creates controlled electric fields that guide liquid crystal molecule alignment, preventing irregular movement. The asymmetry is deliberately designed to match the directional requirements of liquid crystal orientation control.
Solution Approach 2:
Different regions of the display utilize different polarity configurations in the power source supply lines. By tailoring the voltage polarity locally to specific pixel or pixel group requirements, the patent achieves precise control over liquid crystal molecule movement in each region without requiring a completely different overall system architecture, thus managing complexity while maintaining reliability.
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 design achieves a high contrast ratio, wide viewing angle, and fast response speed while reducing the number of data lines, thereby lowering manufacturing costs and preventing display quality deterioration from irregular liquid crystal molecule movement.
Implementation Method 1
A liquid crystal layer is interposed between the first and second substrates and including liquid crystal molecules. Voltages are applied to the electric field generating electrodes to generate an electric field in the liquid crystal layer. Due to the generated electric field, liquid crystal molecules of the liquid crystal layer are aligned and polarization of incident light is controlled, thereby displaying images.
Implementation Method 2
The LCD also includes switching elements connected to the respective pixel electrodes, and a plurality of signal lines such as gate lines and data lines for controlling the switching elements and applying voltages to the pixel electrodes.
Data Source
AI summary
A liquid crystal display wherein a first power source supply line and a second power source supply line are respectively applied with a first voltage and a second voltage having a predetermined magnitude, and a first power source supply line and a second power source supply line are disposed as a pair between a first pixel electrode and a second pixel electrode. The first voltage and the second voltage may have different polarities.