Patterned Retarder Subpixel Configuration for 3D Display Luminance
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Solution Overview
Problem
Existing image display devices using glass methods for 3D image creation suffer from degraded visibility of both 2D and 3D images due to crosstalk and luminance reduction, particularly at wider viewing angles, caused by black stripes intended to enhance 3D visibility, which interact with display panel black matrixes and reduce pixel luminance.
Innovation Solution
An image display device with a patterned retarder and subpixel configuration that applies data voltages and luminance compensation voltages to subpixels to improve 2D and 3D image visibility without the need for black stripe patterns, enhancing viewing angles and maintaining luminance by using a quad-type pixel structure and fine subpixels for 3D mode and luminance compensation in 2D mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If black stripe patterns are formed at the patterned retarder regions to improve 3D image visibility and widen viewing angle, then the viewing angle is widened and crosstalk is reduced, but moiré is generated and luminance of 2D image is degraded
Solution Approach 1:
The patent removes the black stripe patterns from the patterned retarder that were causing moiré interference with the display panel's black matrix. By eliminating this harmful element while retaining the essential patterned retarder structure, the invention resolves the moiré issue while maintaining 3D display functionality and viewing angle characteristics.
2Ease of operation
If black stripe patterns are formed at the patterned retarder regions to improve 3D image visibility and widen viewing angle, then the viewing angle is widened, but luminance of 2D image is degraded due to coverage of pixels
Solution Approach 1:
The patent applies different optical properties to different regions: the patterned retarder maintains its polarization-controlling function in specific areas while removing black stripe patterns from regions that would otherwise block light. This localized differentiation allows the viewing angle to be maintained through the patterned retarder's optical design without the luminance penalty of black stripe coverage.
3Ease of operation
If the size of black matrixes and black stripes is increased to widen viewing angle, then the viewing angle widens, but the luminance reduction and moiré generation are exacerbated
Solution Approach 1:
The patent eliminates the black stripe patterns entirely, removing the source of both moiré generation and luminance blockage. By extracting this harmful element while preserving the patterned retarder's essential structure, the invention achieves viewing angle control without the adverse effects of black stripe coverage.
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 widens the 3D viewing angle while maintaining high luminance and preventing moiré and luminance degradation, offering improved visibility for both 2D and 3D images without the side effects of black stripe patterns.
Implementation Method 1
a left and right parallax image is displayed on a direct view-based display device or a projector by changing a polarization direction of the left and right parallax image
Implementation Method 2
a patterned retarder 5 for converting polarization characteristics of light incident on the polarization glasses 6 from the display panel 3
Data Source
AI summary
An image display device includes an image display panel including a plurality of pixels configured to display a 2D image or a 3D image, a driving circuit configured to apply a data voltage in a 2D image format or a data voltage in a 3D image format to the image display panel, a controller configured to control the driving circuit in a 2D mode for displaying the 2D image or in a 3D mode for displaying the 3D image, and a patterned retarder configured to convert light from the image display panel to alternately have a first polarization and a second polarization, wherein each pixel includes first to fourth subpixels, and the data voltage in the 2D image format is applied to the first to third subpixels and a luminance compensation voltage is applied to the fourth subpixel in the 2D mode, while the data voltage in the 3D image format is applied to the first to third subpixels and a dark gray voltage is applied to the fourth subpixel in the 3D mode.