Segmented Pixel Electrodes for 3D Display Viewing Angle
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Solution Overview
Problem
Conventional 3D display devices using polarizing glasses suffer from reduced 3D image visibility due to crosstalk at vertical viewing angles, and the methods to increase viewing angle, such as forming black stripes, result in moiré and reduced 2D image visibility and luminance.
Innovation Solution
A display device with a pixel electrode array divided into main and secondary portions, where all portions display images in 2D mode and the secondary portions form black stripes in 3D mode, using a gate driving device to input control signals and data signals accordingly, allowing for a larger viewing angle without affecting image visibility or luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If black stripes are formed on the retarder to increase vertical viewing angle, then the vertical viewing angle increases, but moiré is generated and 2D image visibility is greatly reduced
Solution Approach 1:
The pixel electrode is divided into a first pixel electrode portion and a second pixel electrode portion. The first portion corresponds to the black stripe region and the second portion corresponds to the image display region. This segmentation allows independent control of each portion, enabling the black stripe function without affecting overall image quality.
Solution Approach 2:
Different regions of the pixel electrode are assigned different functions: the first pixel electrode portion forms black stripes for viewing angle control, while the second pixel electrode portion displays images. This local differentiation resolves the conflict between viewing angle enhancement and image visibility.
2Duration of action of moving object
If black stripes are formed on the retarder to increase vertical viewing angle, then the vertical viewing angle increases, but luminance of the 2D image is reduced
Solution Approach 1:
By segmenting the pixel electrode into first and second portions, the black stripe formation is localized to the first portion while the second portion maintains full luminance for image display, preventing overall luminance reduction.
Solution Approach 2:
The black stripe function is implemented partially by using only the first pixel electrode portion, allowing the second portion to compensate for any luminance loss and maintain overall image brightness.
3Duration of action of moving object
If the size of black matrix and black stripes increase to increase vertical viewing angle, then the vertical viewing angle increases, but the area available for image display decreases
Solution Approach 1:
The pixel electrode is segmented into functional portions, with the second portion dedicated to image display and the first portion to black stripe formation. This allows optimization of each portion's size independently, maximizing image display area while maintaining viewing angle performance.
Data Source
AI summary
Disclosed are a display device and a driving method thereof in 2D/3D display field. The display device comprises: a display panel comprising a pixel electrode array, wherein each of the pixel electrode comprises at least one main pixel electrode portion (P1, P2) and at least one secondary pixel electrode portion (P1′, P2′), a gate line (GE1, GE2) is disposed between two adjacent rows of pixel electrodes, a gate line (GO1, GO2) is disposed between portions of each pixel electrode, a data line (DO) is disposed between two adjacent columns of pixel electrodes, and all portions of the pixel electrodes in the same column are connected to a same data line (DO); and a gate driving device (3-2) for inputting a gate shift pulse and a control signal to the display panel, so that for the display panel, in a 2D mode, all portions of the pixel electrodes are inputted with data signals, and in a 3D mode, a portion of each pixel electrode is inputted a data signal while another portion is not inputted with the data signal but used to form a black stripe. In the display device and the driving method for the same, black stripes are formed in the display panel so that the display device has larger viewing angle without affecting the visibility and luminance of the display device.