Display Panel View Control for Privacy Protection
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Solution Overview
Problem
Conventional liquid crystal display (LCD) technologies fail to effectively protect business secrets and personal privacy from peeping, as they cannot adapt to surrounding environments to control visibility.
Innovation Solution
A display apparatus with a view control device that identifies the number of users and adjusts the driving voltage of scan lines to switch between two view modes, one with a larger visual angle for normal use and another with a smaller visual angle for privacy protection, using thin film transistors and a refractive index difference in optical film layers to control light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the display panel uses a fixed visual angle design, then the manufacturing complexity is low, but the privacy protection capability is insufficient
Solution Approach 1:
The display panel is segmented into multiple sub-pixel regions, with each sub-pixel region containing multiple view pixels (first view pixels and second view pixels) that can be independently controlled. This segmentation allows different portions of the display to show different content at different viewing angles, enabling privacy protection while maintaining overall display functionality.
Solution Approach 2:
The display panel dynamically switches between different view modes by adjusting the driving voltage of scan lines. When in first view mode, all pixels display content with a wide viewing angle. When in second view mode, the display switches to a narrow viewing angle for privacy protection. This dynamic adjustment resolves the contradiction between fixed structure simplicity and adaptive privacy protection.
2Object-affected harmful factors
If the display panel switches between different view modes, then the privacy protection capability is improved, but the control complexity increases
Solution Approach 1:
The view control device merges multiple control functions into a single integrated unit that manages both the first and second view pixels. It controls the driving voltages of scan lines to switch between view modes and coordinates the operation of multiple pixels simultaneously, simplifying the overall control architecture while achieving privacy protection.
Solution Approach 2:
The view control device incorporates a detection unit that detects surrounding environmental information (such as the presence of other people) and provides feedback to the control unit. Based on this feedback, the system automatically adjusts the view mode, enabling intelligent privacy protection without requiring complex manual control mechanisms.
3Object-affected harmful factors
If the display panel uses multiple view pixels per sub-pixel region, then the anti-peeping effect is enhanced, but the manufacturing cost increases
Solution Approach 1:
The invention changes the electrical parameters (driving voltage levels) of the scan lines to control different view modes. By adjusting voltage parameters rather than requiring complex physical reconfiguration, the system achieves multiple view modes using the same hardware structure, reducing manufacturing complexity and cost.
Solution Approach 2:
The scan lines serve multiple functions: they drive both the first view pixels and second view pixels, and by adjusting their driving voltage, they enable switching between different view modes. This multi-functionality reduces the need for separate control circuits for each pixel type, simplifying manufacturing while enhancing privacy protection capabilities.
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 provides intelligent anti-peeping functionality by adjusting the visual angle based on user presence, effectively protecting privacy while maintaining normal display functionality.
Implementation Method 1
an optical film layer on a side of the color filter layer facing the liquid crystal layer, wherein a refractive index of the optical film layer is smaller than a refractive index of the liquid crystal layer
Data Source
AI summary
A display apparatus and a control method for controlling a display apparatus are provided. The display apparatus includes: a display panel including multiple rows of scan lines and multiple columns of data lines, the scan lines and the data lines defining multiple sub-pixel regions, a first view pixel and a second view pixel being provided in each sub-pixel region; and a view control device connected with display panel, the view control device configured to: identify the number of users on a user side of display panel; and control a driving voltage of the scan lines according to the number of the users, so that the display panel controls first view pixel and second view pixel according to driving voltage so as to display a first view mode or a second view mode. A visual angle in the first view mode is greater than a visual angle in the second view mode.