Pixel Array with Surrounding Electrode for Crosstalk Reduction
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Solution Overview
Problem
Large-sized LCDs face challenges with viewing angle and crosstalk phenomena, which degrade display quality, particularly in advanced-MVA LCDs, where color washout and sub-pixel crosstalk issues persist.
Innovation Solution
A pixel array design featuring a plurality of scan lines, data lines, and sub-pixels with specific thin film transistors and pixel electrodes, where each sub-pixel includes a first, second, and third switch, and pixel electrodes, with the second pixel electrode surrounding the first to reduce crosstalk and the common lines disposed under sub-display regions to enhance aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display size is increased, then the viewing angle is improved, but the color washout phenomenon deteriorates
Solution Approach 1:
The patent divides each sub-pixel into a main display region and a sub-display region, applying different voltages to each region through separate transistor circuits. This segmentation allows independent control of voltage in different regions, enabling optimization of viewing angle while maintaining color accuracy and reducing color washout effects.
Solution Approach 2:
The patent applies different voltage levels to different regions within the same sub-pixel. The main display region and sub-display region are respectively applied with different voltages through adequate circuit design, creating local quality differences that improve viewing angle while preventing color washout.
2Measurement precision
If the sub-pixel density is increased, then the display resolution is improved, but the crosstalk phenomenon between adjacent sub-pixels deteriorates
Solution Approach 1:
The patent introduces a third switch connected to a floating terminal as an intermediary element between the first and second pixel electrodes. This floating terminal acts as a mediator that isolates the pixel electrodes from each other, preventing direct electrical coupling and crosstalk between adjacent sub-pixels while maintaining display resolution.
Solution Approach 2:
The patent extracts the crosstalk problem by introducing a dedicated third switch and floating terminal that separates the electrical paths between adjacent pixel electrodes. This extraction removes the harmful crosstalk effect from the display system while preserving the high resolution achieved through increased sub-pixel density.
3Object-generated harmful factors
If the pixel electrode structure is complex, then the crosstalk reduction is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent implements a nested structure where the first pixel electrode is surrounded by the second pixel electrode within the same sub-pixel. This nesting arrangement, combined with the third switch and floating terminal, creates a compact configuration that reduces crosstalk without significantly increasing manufacturing complexity.
Data Source
AI summary
A pixel array including a plurality of scan lines, a plurality of data lines, and a plurality of sub-pixels is provided. Each sub-pixel is electrically connected to one of the scan lines and one of the data lines correspondingly. Each sub-pixel arranged in the nth row includes a first switch, a second switch, a first pixel electrode, a second pixel electrode and a third switch. The first switch and the second switch are electrically connected to the nth scan line and the mth data line. The first pixel electrode is electrically connected to the first switch. The second pixel electrode is electrically connected to the second switch and has an opening for accommodating the first pixel electrode. In each sub-pixel, the first pixel electrode is surrounded by the second pixel electrode. In addition, the third switch is electrically connected to the (n+1)th scan line and the second pixel electrode.