Liquid Crystal Display Device with Oblique Data Lines
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Solution Overview
Problem
Liquid crystal display devices face issues with moiré visibility and deteriorated numerical aperture when displaying two-dimensional videos, and they struggle to maintain a wide viewing angle while suppressing crosstalk and 3D crosstalk when using IPS mode with cylindrical lenses or parallax barriers.
Innovation Solution
The device employs a configuration with sub-pixels arranged in a matrix on a TFT and CF substrate, using a lens array sheet with cylindrical lenses that distribute light in the X-axis direction, and a data line that obliquely divides sub-pixels at positions different from their boundaries, ensuring constant aperture lengths and minimizing the angle between the data line and the X-axis to maintain high numerical aperture and reduce crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lens array sheet with cylindrical lenses is disposed on a liquid crystal panel to display three-dimensional videos, then spatial separation of light for left and right eyes is achieved, but moiré is likely to be visually recognized when two-dimensional videos are displayed
Solution Approach 1:
The patent applies different aperture configurations to different regions of the display. When displaying three-dimensional videos, the aperture configuration optimizes spatial separation for left and right eyes. When displaying two-dimensional videos, the aperture configuration changes to prevent moiré patterns. This local adaptation to different display modes resolves the contradiction between 3D capability and moiré suppression.
2Manufacturing precision
If the aperture section length in the Y-axis direction is reduced to suppress moiré, then the numerical aperture is improved, but the viewing angle property is deteriorated
Solution Approach 1:
The patent employs a liquid crystal display panel that can dynamically change its aperture configuration based on the display mode. By controlling the liquid crystal molecules' orientation and the aperture section dimensions in real-time, the system can optimize for either numerical aperture (when suppressing moiré is prioritized) or viewing angle property (when wide viewing is prioritized), thus resolving the static contradiction between these two parameters.
3Object-affected harmful factors
If IPS mode is used to achieve wide viewing angle, then viewing angle property is improved, but crosstalk and 3D crosstalk are generated when displaying three-dimensional videos
Solution Approach 1:
The patent adjusts key parameters including the aperture section dimensions, the pitch of cylindrical lenses, and the liquid crystal molecule orientation angles to optimize performance for three-dimensional video display in IPS mode. By carefully controlling these parameters, the system achieves wide viewing angle while minimizing crosstalk and 3D crosstalk through precise optical path management.
4Manufacturing precision
If the data line is disposed to divide sub-pixels obliquely to maintain high numerical aperture, then manufacturing complexity increases
Solution Approach 1:
The patent intentionally introduces asymmetry in the data line configuration, disposing data lines to divide sub-pixels obliquely rather than following conventional symmetric grid patterns. This asymmetric arrangement is specifically designed to maintain high numerical aperture by optimizing light distribution, and while it increases manufacturing complexity, the performance benefits justify the added complexity.
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 effectively suppresses moiré, maintains a wide viewing angle, and reduces crosstalk, achieving high numerical aperture and improved image quality for both two-dimensional and three-dimensional video displays.
Implementation Method 1
liquid crystal molecules thereof being controlled by an electric field that is almost in parallel to those substrates
Implementation Method 2
a liquid crystal layer sandwiched between the first substrate and the second substrate
Implementation Method 3
an optical element which distributes light in the second direction
Implementation Method 4
a lens array sheet with cylindrical lenses that distribute light in the X-axis direction
Data Source
AI summary
A liquid crystal display device is constituted such that sub-pixels are disposed in an array form in a first direction and a second direction orthogonal to each other, a plurality of gate lines are disposed in the second direction, an optical element for distributing the light to the second direction is disposed on the liquid crystal display device, liquid crystal molecules of the liquid crystal display device are controlled by an electric field almost in parallel to the surface of the liquid crystal display device, and a data line is disposed to obliquely divide the sub-pixels at a position different from the boundary between the sub-pixels neighboring in the second direction, where the data line can have a small angle with respect to the second direction, and the numerical aperture is not deteriorated greatly even when the lengths of apertures of the sub-pixels in the first direction are constant.