Privacy Display Device With Conductive Sealant And Merged Electrodes
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Solution Overview
Problem
Existing display devices lack effective solutions for controlling the viewing angle to ensure privacy, as current privacy devices are not adequately designed to restrict the visibility of the display content to unauthorized viewers.
Innovation Solution
A privacy device comprising a liquid-crystal layer sandwiched between two substrates with privacy electrodes and a conductive sealant, allowing for controlled orientation of liquid crystals to adjust the viewing angle by applying electrical signals, thereby limiting visibility to specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a privacy device is added to control viewing angle, then privacy protection is improved, but device complexity increases
Solution Approach 1:
The patent combines the privacy device with the display device by integrating the first substrate, second substrate, and liquid crystal layer into a unified structure. The first privacy electrode and second privacy electrode are merged with the display electrode structures, allowing the privacy function to be implemented without adding separate independent components. This merging approach maintains privacy protection functionality while reducing overall device complexity.
Solution Approach 2:
The liquid crystal layer serves dual functions: it acts as the display medium for showing images and simultaneously functions as the privacy control mechanism by adjusting its molecular orientation based on applied voltage. The same electrode structures used for display control are also used for privacy angle control, making the system multi-functional and avoiding additional complexity from dedicated privacy components.
2Reliability
If privacy electrodes extend into non-display area, then viewing angle control is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the privacy electrode structures with the existing display electrode structures. The first privacy electrode is integrated with the first electrode of the display device, and the second privacy electrode is integrated with the second electrode. This integration allows the electrodes to extend into the non-display area for improved viewing angle control while using the same manufacturing processes and material deposition techniques already established for display electrode fabrication, thereby avoiding increased manufacturing complexity.
3Reliability
If conductive sealant is used to connect electrodes across substrates, then electrical connection is improved, but risk of short circuit increases
Solution Approach 1:
The patent introduces the conductive sealant as an intermediary element that provides electrical connection between the first privacy electrode and second privacy electrode across the substrates. The sealant is positioned in specific regions where it establishes necessary electrical pathways while the insulating properties of the sealant in other areas prevent unwanted electrical contact. This intermediary approach enables reliable electrical connection while managing short circuit risk through controlled positioning and material properties.
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 effectively restricts the viewing angle of display content, ensuring that only authorized users can see the images, enhancing privacy in various scenarios without compromising the display's functionality.
Implementation Method 1
A liquid-crystal layer is disposed between the first substrate and the second substrate. The second privacy electrode is disposed on a surface of the second substrate facing the liquid-crystal layer.
Data Source
AI summary
A privacy device and a privacy display apparatus are provided. The privacy device includes a first substrate, a first privacy electrode, first to fourth pads, a connection electrode, a second substrate, a liquid-crystal layer, a second privacy electrode, and a sealant. The first privacy electrode and the connection electrode are disposed on the first substrate. The first and second pads are coupled to the first privacy electrode. The third and fourth pads are coupled to the connection electrode. The first and second pads are disposed between the third pad and the fourth pad. The liquid-crystal layer and the sealant are disposed between the first substrate and the second substrate. The sealant includes multiple conductors. The connection electrode, the sealant, and the second privacy electrode are in a non-display area and overlap with each other along a direction perpendicular to a top surface of the first substrate.