Display Device Barrier Panel for Narrow Viewing Angle Privacy
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Solution Overview
Problem
Wide viewing angle display devices pose a risk of data leaks and privacy breaches when used in crowded areas, as the content displayed is easily visible to others.
Innovation Solution
A display device and method that incorporates a barrier panel with parallel display barriers above the display panel, controlled by a barrier driver to block the image frame when viewed outside a predetermined visible range, allowing only partial or complete visibility within a narrow viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a wide viewing angle display device is used, then the visibility of the display content is improved, but the privacy protection is worsened as content can be easily exposed to people around
Solution Approach 1:
The display screen is segmented into multiple sub-pixel units (red, green, blue sub-pixels) that can be independently controlled. The barrier panel is segmented into corresponding barrier units that align with these sub-pixels. By controlling specific sub-pixels and their corresponding barrier units, the system can direct light to specific viewing angles while blocking other angles, thus protecting privacy while maintaining visibility.
Solution Approach 2:
A barrier panel is introduced as an intermediary component between the display panel and the external environment. This barrier panel contains barrier units with electrodes that can be activated to block light from specific viewing angles. The intermediary barrier panel mediates between the need for wide visibility and the need for privacy protection by selectively blocking light paths.
2Object-affected harmful factors
If a barrier panel is added to limit viewing angle, then the privacy protection is improved, but the device complexity is worsened
Solution Approach 1:
The barrier panel serves multiple functions: it acts as a structural component of the display device, provides privacy protection by blocking off-angle viewing, and can be integrated with the existing display driver circuitry. The barrier units share the same pixel structure and control mechanism as the display panel, reducing the need for completely separate control systems.
Solution Approach 2:
The barrier panel is merged with the display panel structure, with barrier units positioned in correspondence with display pixel units. The control circuits are combined, with the same driver circuitry controlling both display pixels and barrier units. This merging reduces overall device complexity compared to having separate privacy protection mechanisms.
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
Effectively reduces the risk of content exposure to unauthorized viewers by limiting the visible range of the display panel to a predetermined area, making the image frame partially or completely invisible when viewed beyond that range.
Implementation Method 1
The display barriers are configured to block light when the electrodes are in an on state
Implementation Method 2
The display barriers are configured to allow light to pass through when the electrodes are in an off state
Data Source
AI summary
A display device and display method thereof are provided in the field of image displaying technology. The display device includes: a controller, a display driver and a barrier driver. The controller is configured to send an image frame to the display driver and send a first instruction to the barrier driver. The display driver is configured to drive the display panel to display the image frame on a plurality of display areas which are parallel and distributed at intervals. The barrier driver is configured to turn on the electrodes of the first display barriers in the barrier panel according to the first instruction. The first display barriers are configured to block light when energized. Apart from the first display barriers, second display barriers are configured to allow light to pass through. The display device thus provides a visible range within a preset narrow viewing angle.