Liquid Crystal Device Third Electrode Electric Field Interference
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Solution Overview
Problem
In high-resolution IPS liquid crystal display devices, the close proximity of pixels leads to interference between electric fields, causing image distortion and degradation in display quality due to reverse twist of liquid crystal molecules, especially when signal lines and scanning lines interrupt the intended electric field.
Innovation Solution
A liquid crystal device design featuring a first and second substrate with specific electrode configurations, including a third electrode that extends between pixels to suppress electric field interference and reverse twist, while maintaining light transmission efficiency by using transparent or metallic electrodes and light shielding layers to minimize pixel area reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel pitch is made small to achieve high-resolution image display, then the image resolution is improved, but the electric field interference between adjacent pixels increases causing display quality degradation
Solution Approach 1:
A third electrode is introduced as an intermediary element positioned between adjacent pixels. This electrode acts as a mediator to counterbalance the electric field generated by pixel electrodes, preventing the electric field from interfering with the common electrode of adjacent pixels. The third electrode is connected to a potential that is different from both the pixel electrode and common electrode, creating an intermediate electric potential that stabilizes the electric field distribution.
Solution Approach 2:
The invention changes the electrical parameter (potential) by introducing a third electrode connected to a specific potential that is different from the pixel electrode potential and common electrode potential. This parameter change creates a controlled electric field environment that prevents interference between adjacent pixels while maintaining the desired electric field strength within each pixel for proper liquid crystal modulation.
2Measurement precision
If the pixel pitch is made small to achieve high-resolution image display, then the image resolution is improved, but reverse twist of liquid crystal molecules occurs causing image distortion
Solution Approach 1:
The third electrode serves as an intermediary that stabilizes the electric field environment for liquid crystal molecules. By positioning the third electrode between adjacent pixels and connecting it to a controlled potential, the invention prevents the electric field from distorting the liquid crystal alignment, thereby preventing reverse twist and maintaining consistent liquid crystal orientation across the display.
Solution Approach 2:
The invention changes the electrical parameter (potential distribution) by introducing the third electrode with a specific potential. This parameter change ensures that the electric field strength and direction remain within the optimal range for liquid crystal alignment, preventing the electric field from becoming strong enough to cause reverse twist while still enabling proper liquid crystal modulation for high-resolution display.
3Adaptability or versatility
If signal lines and scanning lines are added to supply voltage and control signals, then the device functionality is improved, but the electric field generated by pixel electrodes is interrupted causing display quality degradation
Solution Approach 1:
The third electrode acts as an intermediary that compensates for the electric field interruption caused by signal lines and scanning lines. By positioning the third electrode between adjacent pixels and connecting it to a controlled potential, the invention creates a continuous electric field path that bypasses the interruption caused by conductive lines, ensuring stable electric field distribution across the entire pixel array.
4Object-affected harmful factors
If extending electrodes are added to suppress electric field interference, then the display quality is improved, but the pixel area is reduced causing brightness loss
Solution Approach 1:
The invention moves the electric field control function from the pixel plane to the inter-pixel region. By positioning the third electrode between adjacent pixels rather than within the pixel area, the invention suppresses electric field interference in the vertical dimension (between pixels) without encroaching on the horizontal pixel area, thereby maintaining brightness while improving display quality.
Solution Approach 2:
The third electrode serves as an intermediary element positioned in the space between adjacent pixels. This intermediary structure suppresses electric field interference by counterbalancing the electric field in the inter-pixel region without requiring any extension into the pixel area itself, thus maintaining full pixel area and brightness while preventing display quality degradation.
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 effectively suppresses electric field interference between adjacent pixels, preventing reverse twist and maintaining high display quality with minimal brightness loss, suitable for applications like projectors that require bright and clear images.
Implementation Method 1
a liquid crystal layer that is interposed between the first and second substrates and is aligned in an in-plane direction of the first or second substrate according to an electric field generated between the first and second substrates
Data Source
AI summary
A liquid crystal device includes a first substrate and a second substrate disposed opposite the first substrate. The liquid crystal device further has a first light shielding layer of a surface of the first substrate; a first electrode having an electrode portion extending in a predetermined direction; and a second electrode of the surface of the second substrate facing the first substrate. The second electrode is formed such that at least a part thereof overlaps the first light shielding layer in plan view and has an electrode portion extending in a direction along the electrode portion of the first electrode. The device further has a third electrode of the surface of the second substrate; and a liquid crystal layer interposed between the first and second substrates and aligned in an in-plane direction of the first or second substrate.