LCD Pixel Structure Reduces Cross-Talk and Maintains Aperture
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Solution Overview
Problem
Existing 3D display technologies face issues with high cross-talk (XTALK) due to large-angle light entering the wrong phase retardation coating, leading to poor 3D visual angle and increased energy consumption, while solutions like increasing the black matrix width or altering pixel light-emitting areas result in reduced aperture opening ratio and increased costs.
Innovation Solution
A display pixel structure comprising parallel pixel areas with two sub-pixel areas, where every three adjacent pixel elements form a group corresponding to primary colors, allowing for flexible control and reduced data line usage, with the first sub-pixel area controlled to form black domains during 3D display to prevent XTALK and maintain aperture opening ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the black matrix width is increased to block large-angle light and prevent XTALK, then the 3D visual angle is improved, but the aperture opening ratio becomes small and energy consumption performance deteriorates
Solution Approach 1:
The pixel structure is segmented into multiple sub-pixels (first sub-pixel, second sub-pixel, third sub-pixel) with different color filters arranged in a specific sequence. This segmentation allows selective control of light transmission for different viewing angles without requiring a large black matrix, thereby maintaining aperture ratio while preventing XTALK.
Solution Approach 2:
Different regions of the pixel structure are assigned different functions: the first sub-pixel region handles broad-spectrum transmission for 2D viewing, while the second and third sub-pixel regions with specific color filters (cyan and magenta) are optimized for 3D viewing angles. This local differentiation enables angle-specific light control without sacrificing overall aperture.
2Reliability
If the pixel light-emitting area is reduced to minimize wrong light entering phase retardation coatings, then XTALK is reduced, but the aperture opening ratio becomes small
Solution Approach 1:
The pixel structure employs an asymmetric arrangement where the first sub-pixel has a different color filter configuration compared to the second and third sub-pixels. Specifically, the first sub-pixel allows broader transmission while the other two use narrow-band filters (cyan and magenta) to block specific wavelengths, creating an asymmetric light transmission profile that reduces XTALK while maintaining aperture.
Solution Approach 2:
The invention changes the optical parameters of different sub-pixel regions by applying different color filters with specific transmission characteristics. The cyan filter transmits green and blue wavelengths while blocking red, and the magenta filter transmits red and blue while blocking green. This parameter differentiation enables wavelength-selective transmission that prevents XTALK without reducing aperture area.
3Measurement precision
If two data lines or two gates are used to independently control pixels for precise light-emitting area control, then light control precision is improved, but the cost of IC increases
Solution Approach 1:
The pixel structure is designed to be multi-functional, supporting both 2D and 3D display modes using the same physical structure and control signals. The first sub-pixel can be used for both 2D and 3D modes, while the second and third sub-pixels are activated only in 3D mode. This universality eliminates the need for additional independent control lines, maintaining simplicity while achieving precise control.
Solution Approach 2:
The invention employs periodic control of sub-pixel activation based on the display mode. In 2D mode, the first sub-pixel is activated periodically with standard refresh rates. In 3D mode, the control signal periodically activates the second and third sub-pixels in synchronization with the stereoscopic image frames, enabling precise temporal control without additional hardware complexity.
Data Source
AI summary
The present invention discloses a display pixel structure, a liquid crystal panel, a liquid crystal display (LCD) device and a driving method. Said display pixel structure comprises multiple parallel pixel areas; each said pixel area comprises two single rows of first sib-pixel area and second sub-pixel area which are mutually parallel; said second sub-pixel area comprises multiple pixel elements; every three adjacent pixel elements form a group; and the three pixel elements of each group are respectively corresponding to three primary colors. The present invention has the advantages that the corresponding phase retardation coating is not exceeded within the range of wider light; the XTALK problem under the condition of large-angle light is avoided; the viewed color is not changed because the light emitted by each pixel of the second sub-pixel area is not blocked; and higher aperture opening ratio is obtained.