Display Subpixel Segmentation for Privacy and Viewing Angle Control
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Solution Overview
Problem
Conventional display devices with privacy protection mechanisms compromise display quality, optical character, thickness, and weight, and limit the viewing angle for valid users, causing interference patterns when viewing images from non-front angles.
Innovation Solution
The method involves determining privacy protecting regions and normal display regions on a display screen, processing image data in these regions using different viewing modes to generate corresponding driving data, allowing for narrow viewing in protected areas and wide viewing in normal areas, thereby avoiding interference patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a privacy protecting mechanism is added to achieve privacy protection, then privacy protection effect is improved, but display quality deteriorates
Solution Approach 1:
The display screen is divided into multiple pixel units, and each pixel unit is further divided into sub-pixels with different emission characteristics. By segmenting the display into controllable regions with different viewing angle properties, the system achieves privacy protection in specific areas while maintaining normal display quality in other areas, thus resolving the contradiction between privacy protection effect and display quality
Solution Approach 2:
Different regions of the display screen are assigned different optical characteristics. Privacy-protected regions use narrow viewing angle sub-pixels while normal display regions use wide viewing angle sub-pixels. This local differentiation allows privacy protection to be applied only where needed, preserving overall display quality while achieving the required privacy protection effect
2Reliability
If a privacy protecting mechanism is added to achieve privacy protection, then privacy protection effect is improved, but device thickness increases
Solution Approach 1:
The patent extracts the privacy protection function from a separate physical privacy filter layer and integrates it directly into the display pixel structure through sub-pixel design. By taking out the privacy protection mechanism from the optical path layers and embedding it in the light emission source itself, the need for additional thick privacy filter layers is eliminated, thus maintaining thin device profile while achieving privacy protection
3Reliability
If a privacy protecting mechanism is added to achieve privacy protection, then privacy protection effect is improved, but device weight increases
Solution Approach 1:
The privacy protection function is extracted from separate privacy filter components and integrated into the display pixel structure. By eliminating the need for additional privacy filter layers and their supporting structures, the overall device weight is reduced while privacy protection functionality is maintained through the sub-pixel emission control mechanism
4Reliability
If a privacy protecting mechanism is added to achieve privacy protection, then privacy protection effect is improved, but viewing angle for valid user is limited
Solution Approach 1:
The display is segmented into different pixel types with different viewing angle characteristics. Wide viewing angle pixels are positioned in regions where the valid user needs to view the display, while narrow viewing angle pixels are positioned in regions where privacy protection is prioritized. This spatial segmentation allows the system to provide both wide viewing angle for valid users and privacy protection simultaneously, resolving the contradiction between privacy protection effect and viewing angle adaptability
Data Source
AI summary
An image privacy protecting method is provided. Positions of a privacy protecting region and a normal display region are acknowledged first. When a frame of image is processed, a first image data will be displayed in the privacy protecting region is processed in a narrow viewing mode to obtain a narrow viewing driving data, and a second image data will be displayed in the normal display region is processed in a wide viewing mode to obtain a wide viewing driving data. Finally, display operations are performed in the privacy protecting region and the normal display region respectively according to the narrow viewing driving data and the wide viewing driving data.