Bending Pixel Electrodes for Display Brightness
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Solution Overview
Problem
Conventional display devices experience a reduction in brightness due to conductive lines crossing subpixels, which affects the area and brightness of the display.
Innovation Solution
The display device incorporates elongated pixel electrodes with bending portions and conductive lines that overlap these electrodes via an insulator, extending in the pixel electrode widthwise direction and being electrically connected to a common electrode, which helps in reducing the brightness reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conductive lines cross the middle sections of subpixels, then the areas of holes in subpixels are reduced and uniformity is improved, but brightness is reduced
Solution Approach 1:
The conductive lines are extracted from crossing the pixel electrodes and relocated to overlap only with the bending portions. This separation removes the harmful effect of conductive lines blocking light transmission through the main pixel areas while preserving the electrical connection function.
Solution Approach 2:
The conductive lines are positioned to overlap only with the bending portions of the pixel electrodes, which are regions with different optical characteristics. This localized placement ensures that the conductive lines do not affect the uniformity of hole areas across subpixels while minimizing their impact on overall brightness.
2Reliability
If conductive lines are placed in pixel holes, then electrical connection is achieved, but the area available for light transmission is reduced
Solution Approach 1:
The conductive lines are positioned in the widthwise direction of pixel electrodes rather than crossing them lengthwise. This dimensional reorientation allows the conductive lines to overlap with bending portions without significantly reducing the area available for light transmission in the pixel holes.
Solution Approach 2:
The bending portions of the pixel electrodes serve as intermediary regions where conductive lines can be placed. These bending portions act as a buffer zone that provides electrical connection functionality while having minimal impact on the optical performance and light transmission area of the pixel holes.
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 effectively minimizes the impact of conductive lines on brightness, maintaining image quality by controlling the orientation of liquid crystal molecules and reducing the contribution of blocked light to the image display.
Implementation Method 1
controlling the orientation of liquid crystal molecules and reducing the contribution of blocked light to the image display
Data Source
AI summary
A display device includes a liquid crystal layer, pixel electrodes, a common electrode, and conductive lines. The pixel electrodes each have an elongated shape and include bending portions in a middle with respect to a pixel electrode lengthwise direction. The common electrode overlaps the pixel electrodes via an insulator. The conductive lines extend in a pixel electrode widthwise direction to overlap the bending portions of the pixel electrodes via an insulator. The conductive lines are electrically connected to the common electrode.