Liquid Crystal Display Sub-Pixel Wiring and Capacitor Sharing
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Solution Overview
Problem
Liquid crystal display devices with multiple sub-pixels face challenges in maintaining a high aperture ratio, leading to decreased luminance and increased power consumption, while also risking short-circuiting due to high wiring density and reduced manufacturing yield, which increases costs and reduces product lifespan.
Innovation Solution
A liquid crystal display device with three or more sub-pixels per pixel, where the potential of the third capacitor wiring is kept almost constant, and storage capacitor wirings are shared between adjacent pixels to maintain a high aperture ratio and reduce wiring density, thereby minimizing the risk of short-circuiting and improving manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of sub-pixels is increased to improve viewing angle characteristic and image quality, then the viewing angle characteristic and image quality are improved, but the aperture ratio decreases
Solution Approach 1:
Adjacent pixels share common capacitor wirings (first capacitor wiring and second capacitor wiring) to reduce the total number of wirings. This merging of resources allows multiple sub-pixels to be accommodated without proportionally increasing wiring density, thereby maintaining aperture ratio while supporting improved viewing angle characteristics through multiple sub-pixels per pixel.
2Illumination intensity
If the aperture ratio is increased to maintain high luminance, then the luminance is maintained, but the viewing angle characteristic deteriorates
Solution Approach 1:
Each pixel is segmented into multiple sub-pixels (first, second, and third sub-pixels) with different liquid crystal orientation states. This segmentation allows the display to achieve wide viewing angle characteristics through diverse orientation patterns while maintaining sufficient aperture ratio by efficiently sharing capacitor wirings among the segmented sub-pixels.
3Adaptability or versatility
If the density of arrangement of wirings and electrodes is increased to accommodate more sub-pixels, then the number of sub-pixels is increased, but short-circuit occurs and manufacturing yield decreases
Solution Approach 1:
The first capacitor wiring and second capacitor wiring serve multiple functions: they act as storage capacitor electrodes for multiple different pixels simultaneously. This multi-functionality reduces the total wiring count and density required, accommodating more sub-pixels per pixel without increasing wiring density to problematic levels, thereby maintaining manufacturing yield and reliability.
4Illumination intensity
If the luminance of backlight is increased to suppress decrease in luminance, then the luminance is maintained, but power consumption becomes high
Solution Approach 1:
By merging capacitor wirings between adjacent pixels, the aperture ratio is maintained at high levels. This allows the display to achieve wide viewing angle characteristics through multiple sub-pixels without sacrificing luminance, thereby avoiding the need to increase backlight luminance and the associated power consumption increase.
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 viewing angle characteristics, maintains high luminance, reduces power consumption, and extends the product lifespan while lowering manufacturing costs by balancing aperture ratio and viewing angle performance.
Implementation Method 1
one pixel is divided into a plurality of sub-pixels to make an oriented state of liquid crystals different
Data Source
AI summary
To provide a display device in which a viewing angle characteristic is improved by providing a plurality of sub-pixels to one pixel. Alternatively, to provide a display device in which an aperture ratio is suppressed even when a plurality of sub-pixels is provided. A pixel including first sub-pixel, a second sub-pixel, and a third sub-pixel, a scanning line, a signal line, a first capacitor wiring, a second capacitor wiring and a third capacitor wiring are provided. Pixel electrodes each electrically connected to one electrode of the first to third capacitor elements, and the first to third capacitor wirings, respectively, are provided to the first to third sub-pixels electrodes, respectively. Potentials of the first capacitor wiring and the second capacitor wiring are changed and a potential of the third capacitor wiring is kept almost constant.