Display Panel Anti-Peeping Subpixel Control
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Solution Overview
Problem
Conventional anti-peeping display technologies fail to effectively prevent unauthorized viewing, as individuals positioned directly in front of the display panel can still see the content, lacking ideal privacy protection.
Innovation Solution
A display panel comprising pixel units with both display subpixels and interference subpixels of different colors and/or gray scales, where the display subpixel is switched on during a first period and the interference subpixel is switched off during that period and on during a second period, creating a superimposition effect that obscures the normal image to unauthorized viewers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the view angle of the display panel is reduced to achieve anti-peeping, then persons located around the display panel cannot see the content, but persons located right in front of the display panel (including peepers) can still see the content clearly
Solution Approach 1:
The patent applies periodic action by alternately switching display subpixels and interference subpixels on and off in different time periods within each display frame. Display subpixels are activated in a first time period to show normal content, while interference subpixels are activated in a second time period to generate interference patterns. This temporal multiplexing creates time-varying optical effects that prevent unauthorized viewing while maintaining normal display functionality for authorized users.
Solution Approach 2:
The patent utilizes color changes by employing interference subpixels with different colors (such as cyan, magenta, or green) compared to the corresponding display subpixels. When interference subpixels are activated, they emit different colors that create visual interference patterns when viewed without special glasses. This color differentiation enhances the anti-peeping effect by making the interference pattern more distinct and harder to distinguish from actual content.
2Reliability
If conventional anti-peeping methods are used, then the device complexity remains low, but the privacy protection effectiveness is insufficient
Solution Approach 1:
The patent applies segmentation by dividing each pixel into multiple subpixels, further dividing them into display subpixels and interference subpixels. This segmentation allows independent control of different subpixel types, enabling the complex anti-peeping functionality to be implemented through coordinated control of separate subpixel groups while maintaining the overall pixel structure.
Solution Approach 2:
The patent implements dynamics by dynamically switching between different subpixel activation states within each display frame. The control unit dynamically adjusts which subpixels are active in different time periods, creating time-varying display characteristics that provide anti-peeping protection. This dynamic control allows the display to adapt its behavior based on viewing conditions while maintaining normal operation.
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 ensures that only intended users with a specific viewing device can clearly see the normal image, while others are unable to identify the content due to the visual persistence of the interference image, thereby enhancing privacy protection.
Implementation Method 1
the light emitting layers of the display subpixel and the interference subpixel are configured to emit red light, green light, blue light, cyan light, magenta light or yellow light
Implementation Method 2
due to visual persistence of human eyes for a varying image, the viewer will see a superimposition of the interference image and the normal image
Data Source
AI summary
This disclosure relates to a display panel, a control method thereof, a display device and a display system comprising such a display panel. The display panel includes a plurality of pixel units. Each pixel unit has a plurality of subpixels Each subpixel has a display subpixel and an interference subpixel. Additionally, the interference subpixel and the display subpixel are different in at least one of color and gray scale. The display panel also includes a first control unit configured to control the display subpixel to be switched on during a first period of time in each display period, and to control the interference subpixel to be switched off during the first period of time in each display period and switched on during a second period of time in each display period.