Conductive Spacer for Horizontal Field LCD Aperture Ratio
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Solution Overview
Problem
Existing techniques for improving the aperture ratio and wide viewing angle in horizontal electric field LCDs are not applicable, as they either disrupt the formation of the horizontal electric field or misalign the liquid crystals, leading to reduced performance.
Innovation Solution
A horizontal electric field LCD design featuring a conductive spacer that electrically connects the pixel electrode to the thin film transistor, allowing for increased distance between the data line and pixel electrode while maintaining the horizontal electric field, thereby enhancing aperture ratio and brightness without affecting the liquid crystal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the pixel electrode and the data line are spaced further apart to reduce parasitic capacitance interference, then the aperture ratio decreases and the shielded area increases, but the parasitic capacitance interference is reduced
Solution Approach 1:
A conductive spacer is introduced as an intermediary component between the pixel electrode and the data line. This spacer serves as a mediator that provides a controlled electrical connection path while maintaining physical separation, thereby reducing parasitic capacitance interference without requiring excessive spacing that would reduce the aperture ratio.
Solution Approach 2:
The solution transitions from a two-dimensional planar spacing approach to a three-dimensional vertical connection approach. By using a conductive spacer that extends vertically between the pixel electrode and data line, the design achieves electrical connection while maintaining horizontal separation, effectively utilizing the third dimension to resolve the spacing conflict.
2Area of stationary object
If a thick organic insulating layer is inserted between the pixel electrode and the data line to reduce parasitic capacitance, then the aperture ratio increases, but the manufacturing complexity increases
Solution Approach 1:
The invention changes the key parameter from insulating material thickness to conductive spacer geometry and position. Instead of varying the thickness of organic insulating layers, the solution controls the aperture ratio and parasitic capacitance by adjusting the conductive spacer's dimensions, material properties, and spatial configuration, which simplifies the manufacturing process.
3Area of stationary object
If the straight line distance between the pixel electrode and the common electrode is increased to improve aperture ratio, then the aperture ratio increases, but the horizontal electric field formation is disrupted
Solution Approach 1:
The conductive spacer is segmented into multiple sections or layers, allowing different portions to serve different functions. Some segments maintain the horizontal electric field path between pixel electrode and common electrode, while other segments provide the necessary electrical connection to the data line, thus resolving the conflict between aperture ratio and field formation.
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 solution effectively increases the aperture ratio and improves the brightness of the LCD by reducing the optical thin film requirements, lowering manufacturing costs while maintaining the horizontal electric field's effectiveness.
Implementation Method 1
The spacer is a conductive spacer electrically connecting each pixel electrode on the second substrate to the corresponding thin film transistor on the first substrate
Implementation Method 2
The second substrate comprises a pixel electrode and a common electrode corresponding to and forming a horizontal electric field with the pixel electrode
Implementation Method 3
controls alignment of liquid crystal within the horizontal plane by forming a horizontal electric field
Data Source
AI summary
The embodiments of the present invention relate to a horizontal electric field type LCD and a manufacturing method thereof. The horizontal electric field type LCD comprises a first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a spacer disposed between the first and the second substrates. Said first substrate comprises a thin film transistor, and a gate line and a data line for driving the thin film transistor. Said second substrate comprises a pixel electrode and a common electrode corresponding to and forming a horizontal electric field with the pixel electrode. Said spacer is a conductive spacer electrically connecting each pixel electrode on the second substrate to the corresponding thin film transistor on the first substrate.