Display Sub-Pixel Interference for Anti-Peeping
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Solution Overview
Problem
Traditional anti-peeping methods for display devices are inadequate as they allow individuals positioned in front of the device to still view the content, compromising confidentiality.
Innovation Solution
A display device with a pair of sub-pixels, including a display sub-pixel and an interference sub-pixel of different colors or gray scales, where the sub-pixels emit light in non-overlapping time periods, creating an interference image that superposes with the normal display image, making it unreadable to unauthorized viewers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional anti-peeping methods reduce the viewing angle of the display device, then persons in other positions cannot see the content, but the person located right in front of the display device can still see the content clearly
Solution Approach 1:
The display device alternates between displaying normal content and interference content in different time periods. During the first time period, the display sub-pixel displays normal content while the interference sub-pixel is turned off. During the second time period, the display sub-pixel displays interference content while the interference sub-pixel is turned on. This periodic switching prevents unauthorized viewing while maintaining authorized viewing capability.
Solution Approach 2:
The interference sub-pixel emits light with a different color or gray scale compared to the display sub-pixel. When the interference sub-pixel is activated, it displays interference content with altered color characteristics that make the content unreadable to unauthorized viewers, while authorized users with appropriate viewing devices can still perceive the original content.
2Object-affected harmful factors
If interference sub-pixel is added to enhance anti-peeping, then confidentiality is improved, but device complexity increases
Solution Approach 1:
Each pixel unit is divided into multiple sub-pixels, including at least one display sub-pixel and at least one interference sub-pixel. This segmentation allows the display device to simultaneously present normal content and interference content using different sub-pixels, enhancing confidentiality while maintaining a relatively simple overall structure based on conventional pixel architectures.
Data Source
AI summary
Embodiments of the present disclosure provide a display device and a control method thereof, and a display system. The display device includes a substrate and a pair of sub-pixels disposed on the substrate. The pair of sub-pixels includes a display sub-pixel and an interference sub-pixel, wherein the display sub-pixel and the interference sub-pixel are different in at least one of color or gray scale, wherein the display device has a light outgoing direction intersecting with the substrate; in the light outgoing direction, a projection of the display sub-pixel on a main surface of the substrate at least partially overlaps with a projection of the interference sub-pixel on the main surface of the substrate; and the display sub-pixel and the interference sub-pixel are configured to be capable of respectively emitting light in non-overlapping time periods.