3D Display Backlight Crosstalk Reduction via Segmented Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional auto-stereoscopic 3D display technology suffers from crosstalk issues due to the motion of the grating sheet, which affects the quality of 3D images by causing the human eye to receive mixed left- and right-eye signals.
Innovation Solution
A display device with a backlight module divided into multiple light source units, where each display section is scanned simultaneously with its corresponding light source unit illuminating, while other sections do not illuminate until they are scanned, ensuring that images from different frames are not viewed simultaneously, thereby reducing crosstalk and enhancing 3D image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the backlight module is divided into multiple light source units and scanned simultaneously with the display panel, then crosstalk is reduced and 3D image quality is improved, but the device complexity increases
Solution Approach 1:
The backlight module is divided into multiple independent light source units (first light source unit, second light source unit, etc.) that can be controlled separately. Each light source unit corresponds to specific display sections and can be activated independently during scanning, preventing simultaneous illumination of multiple sections and thereby reducing crosstalk between left and right eye images.
Solution Approach 2:
The system implements dynamic scanning control where the backlight module and display panel are scanned simultaneously in a coordinated manner. The light source units are activated dynamically based on the scanning position - when a display section is being scanned, its corresponding light source unit illuminates, while other light source units remain off until their respective sections are scanned.
2Illumination intensity
If all light source units illuminate continuously, then the display is bright and clear, but images from different frames are viewed simultaneously causing crosstalk
Solution Approach 1:
The light source units operate in periodic cycles synchronized with the scanning process. Each light source unit illuminates only during the specific time period when its corresponding display section is being scanned, and remains off during other periods. This periodic illumination ensures that images from different frames do not overlap in time, eliminating crosstalk while maintaining adequate brightness during the active illumination period.
Solution Approach 2:
The system performs preliminary scanning to determine which display sections need illumination before activating the corresponding light source units. By scanning the display panel and backlight module in coordination, the system prepares the illumination timing in advance, ensuring that only the currently scanned section receives light while other sections remain dark, preventing mixed signal reception.
Data Source
AI summary
A display device for showing 3D images includes a backlight module and a display section. The backlight module includes n light source units. The display unit section includes n display sections. Upon conditions that a first through kth display section are scanned to receive an image in an current frame, a (k+1)th through an nth display section receives an image in a previous frame, a first through a kth light source unit generate light, and a (k+1)th through nth light source unit do not generate light, the first through the kth display sections display according to the image in the current frame and the light from the first through the kth light source unit, while the (k+1)th display section through the nth display section do not display the image in the previous frame due to the (k+1)th light source unit through the nth light source unit not generating light.