LCD Subpixel Segmentation for Side Visibility
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Solution Overview
Problem
LCD apparatuses with vertical alignment mode suffer from lower side visibility compared to front visibility, and existing techniques to improve side visibility, such as capacitive coupling between subpixels, result in inaccurate transmittance adjustment and decreased transmittance due to conductive members and voltage drops.
Innovation Solution
The implementation of a TFT panel and LCD apparatus with first and second subpixels, each connected to distinct gate and data lines, receiving different data voltages derived from single image information, and featuring unique electrode structures including apertures and protrusions on the common electrode to optimize liquid crystal molecule alignment for improved side visibility without compromising transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If capacitive coupling between subpixels is used to improve side visibility, then side visibility is improved, but transmittance decreases due to voltage drops and conductive members
Solution Approach 1:
The pixel is divided into two independent subpixels (first subpixel and second subpixel), each with its own data line and voltage control. This segmentation allows independent voltage adjustment for each subpixel, enabling precise control of light transmission while improving side visibility without the energy loss associated with capacitive coupling.
2Illumination intensity
If conductive members are added for capacitive coupling, then side visibility can be adjusted, but aperture ratio deteriorates and transmittance decreases
Solution Approach 1:
The pixel structure is segmented into two independent subpixels with separate data lines, eliminating the need for additional conductive members required for capacitive coupling. This maintains the aperture ratio while still enabling side visibility improvement through independent voltage control of each subpixel.
3Illumination intensity
If different voltage combinations are applied to subpixels, then transmittance adjustment is possible, but it is difficult to obtain different voltage combinations for different colors
Solution Approach 1:
Each subpixel is equipped with its own data line, allowing independent voltage application. This segmentation simplifies the control architecture compared to capacitive coupling, as each subpixel can receive its required voltage directly without complex voltage division or coupling mechanisms, making it easier to achieve different transmittance levels.
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 configuration enhances side visibility while maintaining or improving transmittance by allowing precise adjustment of subpixel voltages and reducing light leakage, thereby enhancing the overall display quality.
Implementation Method 1
applying a voltage to the electric field generating electrodes to generate an electric field in the liquid crystal layer
Implementation Method 2
determining alignment of liquid crystal molecules in the liquid crystal layer to control polarization of incident light
Implementation Method 3
the direction in which the liquid crystal molecules are tilted can be determined by the use of the apertures and the protrusions
Data Source
AI summary
A liquid crystal display apparatus includes a plurality of pixels having first and second subpixels, a plurality of gate lines connected to the first and second subpixels to transmit gate signals, a plurality of first data lines intersecting the gate lines and connected to the first subpixels to transmit first data voltages, and a plurality of second data lines intersecting the gate lines and connected to the second subpixels to transmit second data voltages. The first and second data voltages have different sizes and are obtained from single image information. Each pixel is divided into a pair of subpixels, and different data voltages are applied to the subpixels through two different data lines, so that it is possible to secure a wide viewing angle and improve side visibility.