Patterned Retarder 3D Display Time-Division Multiplexing
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Solution Overview
Problem
Existing image display devices using the polarization glasses type method for 3D image implementation suffer from reduced visibility and luminance of 2D images due to crosstalk at wider viewing angles, and they cannot achieve full high-definition resolution for 3D images without compromising vertical resolution.
Innovation Solution
An image display device with a patterned retarder configured line by line, where pixels alternately display 3D images and black images every horizontal line in an interlace manner through time division, using two retarders with a vertical pitch twice that of pixels, allowing for improved 3D visibility without reducing 2D image quality and maintaining full HD resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If black stripes are formed in the patterned retarder to improve 3D image visibility, then the upward/downward viewing angle widens, but moiré is generated and 2D image visibility is greatly reduced
Solution Approach 1:
The patent extracts the black stripes from the patterned retarder and replaces them with a black image display method using pixels. Instead of having physical black stripes on the retarder, the display panel shows black images on alternating horizontal lines, achieving the same light-blocking function without creating moiré patterns with the black matrixes.
Solution Approach 2:
The patent introduces a time-division multiplexing mechanism as an intermediary between the display content and the patterned retarder. By alternating between displaying 3D images and black images on different horizontal lines, the system mediates between the need for light blocking (to prevent crosstalk) and the need to avoid moiré interference patterns.
2Reliability
If black stripes are formed in the patterned retarder to improve 3D image visibility, then the upward/downward viewing angle widens, but 2D image luminance is reduced by about 30%
Solution Approach 1:
The patent employs periodic action by alternating between displaying 3D images and black images on alternating horizontal lines through time division. This periodic switching allows the system to achieve the light-blocking effect needed for 3D visibility only when displaying 3D content, while maintaining full luminance when displaying 2D images without black stripes.
Solution Approach 2:
The system dynamically adjusts its behavior based on the display mode. When in 3D mode, it alternates between 3D image lines and black image lines; when in 2D mode, it displays full-color images without black lines, thus dynamically optimizing luminance for the current display mode while maintaining 3D performance when needed.
3Reliability
If spatial separation of left and right eye images is implemented, then 3D image is achieved, but vertical resolution is reduced to about one half of natural resolution
Solution Approach 1:
The patent transitions from spatial separation to temporal separation in the vertical dimension. Instead of dividing the vertical resolution spatially between left and right eye images, the system uses time-division multiplexing where alternating horizontal lines display different eye images in sequence, effectively adding a time dimension to the separation process and preserving full vertical resolution.
Solution Approach 2:
The system prepares the display by pre-organizing the image data into alternating horizontal lines for left and right eye images before display. This preliminary organization allows the patterned retarder and polarization glasses to properly separate the images while maintaining full vertical resolution, as the separation is achieved through the combination of line-based display and temporal multiplexing rather than spatial compression.
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 enhances 3D image visibility by reducing crosstalk and maintains 2D image luminance and resolution, enabling the display of 3D images with ultra-definition or full high-definition+α resolution without the need for separate black stripe patterns, thus providing a wider viewing angle and improved image quality.
Implementation Method 1
a left eye image L and a right eye image R of 3D image are alternately displayed on the display panel 3, and the polarization characteristics of light incident on the polarization glasses 6 are converted by the patterned retarder 5
Implementation Method 2
a liquid crystal layer interposed between the upper and lower glass substrates
Data Source
AI summary
An image display device is discussed. The image display device includes a display panel configured to selectively display a 2D image and a 3D image and a patterned retarder disposed line by line. The patterned retarder includes a first retarder transmitting only a left eye image of the 3D image from the display panel and a second retarder transmitting only a right eye image of the 3D image. Pixels disposed on the display panel alternately display the 3D image and a black image every one horizontal line in an interlace manner through a time division.