Liquid Crystal Display Partition Structure for Aperture Ratio
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Solution Overview
Problem
In liquid crystal displays (LCDs), the alignment of pixel electrodes and color filters on different substrates leads to alignment errors, which complicates the manufacturing process and results in a reduced aperture ratio due to the need for partitions that increase the occupied area.
Innovation Solution
A liquid crystal display design where the pixel electrodes and color filters are formed on the same substrate, using a partition structure with varying thicknesses to separate the color filters and prevent ink flow during inkjet printing, allowing for the formation of a storage capacitor without occupying additional space, thus maintaining a high aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If partitions are formed to prevent liquid ink from flowing to undesired regions, then the color filters can be properly formed, but the area occupied by partitions increases and the aperture ratio deteriorates
Solution Approach 1:
The invention introduces a third dimension (thickness/height) to resolve the two-dimensional area conflict. By making partitions have different thicknesses - thicker at contact holes and storage capacitors, thinner at color filter division regions - the patent prevents ink leakage where critical while minimizing area occupation where less critical, thus resolving the contradiction between manufacturing ease and aperture ratio
Solution Approach 2:
The partition structure applies local quality by varying the thickness of partitions in different regions. Thicker partitions are located at contact holes and storage capacitors where ink containment is critical, while thinner partitions are used at color filter division regions where less containment is needed. This localized differentiation optimizes both ink prevention and aperture ratio
2Device complexity
If pixel electrodes and color filters are disposed on different display panels, then the LCD structure is established, but alignment errors occur between pixel electrodes and color filters
Solution Approach 1:
The invention merges the pixel electrode and color filter onto the same display panel (TFT array substrate), eliminating the need for precise alignment between separate panels. By combining these elements on a single substrate, the patent resolves the alignment accuracy problem while maintaining the overall LCD structure
3Reliability
If partitions occupy more area to prevent ink flow, then ink containment is improved, but the aperture ratio is greatly deteriorated
Solution Approach 1:
The partition structure applies local quality by varying the thickness of partitions in different regions. Thicker partitions are located at contact holes and storage capacitors where ink containment is critical, while thinner partitions are used at color filter division regions where less containment is needed. This localized differentiation optimizes both ink prevention and aperture ratio
Solution Approach 2:
The invention introduces a third dimension (thickness/height) to resolve the two-dimensional area conflict. By making partitions have different thicknesses - thicker at contact holes and storage capacitors, thinner at color filter division regions - the patent prevents ink leakage where critical while minimizing area occupation where less critical, thus resolving the contradiction between manufacturing ease and aperture ratio
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 enhances the aperture ratio by reducing the area occupied by partitions and allowing for efficient inkjet printing of color filters, thereby minimizing manufacturing time and costs while maintaining the display's optical performance.
Implementation Method 1
the color filter may be formed using an inkjet printing method. In the inkjet printing method, liquid ink is jetted to realize color images
Data Source
AI summary
The present invention relates to a liquid crystal display and a manufacturing method thereof. The liquid crystal display includes a first substrate, a plurality of gate lines and data lines disposed on the first substrate and crossing each other to define a plurality of pixels, a plurality of thin film transistors connected to the gate lines and the data lines, a plurality of color filters disposed on the thin film transistors, a partition to divide the color filters, a plurality of pixel electrodes connected to the thin film transistors, a second substrate facing the first substrate, a common electrode disposed on the second substrate, the common electrode forming a liquid crystal capacitor and a storage capacitor along with the pixel electrode, and a liquid crystal layer disposed between the first substrate and the second substrate. Each pixel includes a display region where the pixel electrode and the color filter overlap each other, and a storage region where the pixel electrode and the common electrode form the storage capacitor, and the thin film transistor and the pixel electrode are connected to each other in the storage region.