Liquid Crystal Display Device With Dummy Source Bus Lines
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Solution Overview
Problem
Existing see-through display devices face challenges in reducing the frame area to enhance the external design freedom while maintaining visibility of the background behind the display.
Innovation Solution
A liquid crystal display device is designed with a matrix arrangement of first and second areas, where first areas display images and second areas allow background visibility by maintaining high transmittance, featuring a checkered pattern and incorporating dummy source bus lines to reduce non-display areas and increase design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the frame area is reduced to enhance external design freedom, then the aesthetic appearance and design flexibility are improved, but the structural integrity and manufacturing complexity may worsen
Solution Approach 1:
The invention extracts the frame structure from the traditional display device by eliminating the need for a separate frame. The display panel itself, with its optimized bus line arrangement, serves as the boundary structure, removing the harmful frame element that limited design freedom and aesthetic appearance.
Solution Approach 2:
The display panel is given multiple functions: it serves both as the active display area and as the boundary structure that traditionally required a separate frame. The bus lines are designed to extend to the edges, providing both electrical connection and structural definition, reducing the need for additional framing components.
2Illumination intensity
If transparent electrodes are added to second areas to maintain high transmittance, then the background visibility is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The transparent electrodes in the second areas serve multiple functions: they maintain high transmittance for background visibility, provide electrical connection to the liquid crystal layer, and help define the display area boundaries. This multi-functionality reduces the need for separate components and simplifies the overall structure.
Solution Approach 2:
The electrode structure is segmented into different types (pixel electrodes in first areas, transparent electrodes in second areas) with different functions. This segmentation allows each electrode type to be optimized for its specific purpose while maintaining overall system simplicity through standardized fabrication processes.
3Area of moving object
If dummy source bus lines are added to reduce non-display areas, then the aperture ratio and design freedom are improved, but the device complexity and manufacturing steps increase
Solution Approach 1:
The dummy source bus lines serve multiple functions: they extend the source bus lines to the edge of the display area to reduce non-display areas and increase aperture ratio, provide additional electrical connection paths, and help define the display area boundaries. This multi-functionality justifies the added structural elements.
Solution Approach 2:
The dummy source bus lines are merged with the regular source bus lines in terms of fabrication process and material composition. They are formed using the same transparent conductive material and patterning steps, so while the structure is more complex, the manufacturing process remains unified and manageable.
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
The solution enables clear visibility of the background while reducing the frame area, enhancing the external appearance and design freedom of the display device.
Implementation Method 1
a liquid crystal layer provided between the first substrate and the second substrate
Data Source
AI summary
A liquid crystal display device includes a display area having a plurality of first areas and a plurality of second areas arranged in a matrix in a row direction and a column direction, a plurality of first TFTs each located in one of the plurality of first areas, a plurality of pixel electrodes each located in one of the plurality of first areas, a plurality of transparent electrodes each located in one of the plurality of second areas, a plurality of gate bus lines extending in the row direction and being connected to the plurality of first TFTs, a plurality of source bus lines extending in the column direction and being connected to the plurality of first TFTs, and a plurality of dummy source bus lines each extending in the column direction and being connected to one of the plurality of gate bus lines.