Liquid Crystal Display Pixel Electrode Segmentation
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Solution Overview
Problem
The cost of the driver in liquid crystal displays is increased due to the high number of data lines required, which also limits the display's contrast ratio, viewing angle, and response speed.
Innovation Solution
A liquid crystal display configuration with reduced data lines is implemented, utilizing two gate lines, one data line, and two power supplying lines per pixel, where each pixel is connected to two gate lines forming a pair, allowing for efficient voltage application and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of data lines is increased to improve display quality, then the contrast ratio and viewing angle are improved, but the driver cost increases
Solution Approach 1:
The pixel electrode is divided into two separate electrodes (first pixel electrode and second pixel electrode), each controlled by separate switching elements. This segmentation allows independent control of different pixel regions, enabling improved display quality through differential voltage application while using fewer data lines overall.
Solution Approach 2:
The invention introduces a dual-gate line structure (first gate line and second gate line) that operates in different time dimensions to control the same pixel electrode pair. By utilizing temporal dimension for pixel control, the patent reduces the number of spatial data lines required, thereby lowering driver complexity and cost.
2Speed
If the number of data lines is increased to improve response speed, then the liquid crystal molecule alignment is improved, but the driver cost increases
Solution Approach 1:
The patent employs alternating activation of first and second gate lines in periodic cycles to control pixel switching. This periodic gate signaling enables rapid liquid crystal molecule realignment and faster response speed while maintaining a reduced number of data lines, avoiding the need for increased driver complexity.
3Device complexity
If the number of data lines is reduced to lower driver cost, then the manufacturing cost is reduced, but the contrast ratio deteriorates
Solution Approach 1:
The invention applies different voltages to the first and second pixel electrodes through separate switching elements, creating local quality differences within each pixel. This enables enhanced contrast ratio by independently controlling light modulation in different pixel regions, achieving improved display quality despite using fewer data lines.
Solution Approach 2:
The patent utilizes dual power supplying lines providing different voltage parameters (first voltage and second voltage) to the pixel electrodes. By changing and controlling voltage parameters independently for each electrode, the system achieves superior contrast ratio with reduced data line requirements, lowering overall driver cost.
4Device complexity
If the number of data lines is reduced to lower driver cost, then the manufacturing cost is reduced, but the viewing angle deteriorates
Solution Approach 1:
The patent implements local quality control by dividing each pixel into two independently controllable electrodes with different voltage applications. This enables optimization of liquid crystal alignment for wide viewing angles while using fewer data lines, maintaining excellent viewing angle performance despite reduced driver complexity.
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 configuration enhances the display's contrast ratio, viewing angle, and response speed while lowering the driver's cost by reducing the number of data lines, thereby improving overall display performance and reducing manufacturing expenses.
Implementation Method 1
voltages are applied to the electric field causing 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
Implementation Method 2
polarization of incident light is controlled, thereby displaying images
Data Source
AI summary
A liquid crystal display according to an exemplary embodiment of the present invention includes a first and second substrate facing each other, a liquid crystal layer interposed between the substrates, a plurality of gate lines disposed on the first substrate, configured to transmit a gate signal, at least one data line disposed on the first substrate, configured to transmit a data signal, a plurality of power supplying lines disposed on the first substrate, a plurality of switching elements variously connected to the gate lines, data lines, and power supplying lines, a plurality of pixel electrodes connected to the switching elements, wherein corresponding pixel electrodes are separated from each other.