Belt-Shaped Pixel Electrodes for High-Definition LCDs
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Solution Overview
Problem
The miniaturization of comb-tooth shaped pixel electrodes and pixel electrodes with slits in liquid crystal display devices faces limitations in achieving advanced high definition displays due to the constraints of general exposure machines, and these devices often experience color shifts with changes in driving voltage.
Innovation Solution
A liquid crystal display device with a pixel electrode formed in a belt shape, including a main pixel electrode and auxiliary pixel electrodes, which are designed to minimize color blending and achieve sufficient pixel capacitance without slits, allowing for a wider range of miniaturization and reduced color shift with voltage changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If comb-tooth shaped pixel electrodes or pixel electrodes with slits are miniaturized to achieve high definition displays, then image resolution is improved, but manufacturing precision deteriorates due to the process limit of general exposure machines
Solution Approach 1:
The pixel electrode is divided into a main pixel electrode and multiple auxiliary pixel electrodes. The auxiliary pixel electrodes are positioned at specific locations (such as corners or edges) to provide capacitive coupling without requiring complex slit patterns. This segmentation allows each electrode component to be simpler in structure, making them easier to manufacture with conventional exposure machines while still achieving the desired high definition display quality and sufficient pixel capacitance.
2Measurement precision
If pixel electrodes are miniaturized to achieve high definition displays, then image resolution is improved, but device complexity increases due to the need for precise patterning and additional structural elements
Solution Approach 1:
The pixel electrode is divided into a main pixel electrode and multiple auxiliary pixel electrodes. The auxiliary pixel electrodes are positioned at specific locations (such as corners or edges) to provide capacitive coupling without requiring complex slit patterns. This segmentation allows each electrode component to be simpler in structure, making them easier to manufacture with conventional exposure machines while still achieving the desired high definition display quality and sufficient pixel capacitance.
3Ease of manufacture
If conventional pixel electrode designs are used, then manufacturing is easier, but color shifts occur with changes in driving voltage
Solution Approach 1:
The pixel electrode is divided into a main pixel electrode and multiple auxiliary pixel electrodes. The auxiliary pixel electrodes are positioned at specific locations (such as corners or edges) to provide capacitive coupling without requiring complex slit patterns. This segmentation allows each electrode component to be simpler in structure, making them easier to manufacture with conventional exposure machines while still achieving the desired high definition display quality and sufficient pixel capacitance.
Solution Approach 2:
The auxiliary pixel electrodes act as intermediary elements that provide additional capacitive coupling between the pixel electrode and the common electrode. This intermediary structure helps stabilize the electrical characteristics of the pixel, reducing color shifts that occur with changes in driving voltage while maintaining ease of manufacture.
4Measurement precision
If pixel electrodes are miniaturized to achieve high definition displays, then image resolution is improved, but pixel capacitance becomes insufficient
Solution Approach 1:
The pixel electrode is divided into a main pixel electrode and multiple auxiliary pixel electrodes. The auxiliary pixel electrodes are positioned at specific locations (such as corners or edges) to provide capacitive coupling without requiring complex slit patterns. This segmentation allows each electrode component to be simpler in structure, making them easier to manufacture with conventional exposure machines while still achieving the desired high definition display quality and sufficient pixel capacitance.
Solution Approach 2:
The main pixel electrode and multiple auxiliary pixel electrodes work together as an integrated capacitive structure. The auxiliary pixel electrodes are electrically connected to the main pixel electrode, and both are positioned to face the common electrode, creating combined capacitance that is sufficient for high definition displays while maintaining miniaturized dimensions.
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 design enables the creation of super high definition liquid crystal display devices with image resolutions exceeding conventional FFS mode devices, while minimizing color shifts and improving transmissivity by optimizing the shape and dimensions of the pixel electrodes.
Implementation Method 1
a transverse electric field (including a fringe electric field) such as an in-plane switching (IPS) mode and a fringe field switching (FFS) mode
Implementation Method 2
switches liquid crystal molecules using the transverse electric field which is substantially parallel to the main surface of the array substrate
Data Source
AI summary
According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.