Movable Grating Display for Dual Viewing and Anti-Spy Modes
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Solution Overview
Problem
Existing dual viewing field and anti-spy display technologies face challenges in integrating multiple functions into a single display device, with current solutions either limiting viewing angles or not providing effective privacy protection beyond a certain range.
Innovation Solution
A display device with a matrix of sub-pixels, a grating having alternating light-transmissive and light-shading regions, and a rolling structure between the display screen and grating, allowing the relative position to switch between states for dual viewing field and anti-spy display effects through a push mechanism, enabling flexible positioning of light-transmissive regions across one or two columns of sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a grating is disposed in front of a display screen to achieve dual viewing field display, then different images can be seen on two different sides of the display device, but the structure becomes more complex and the manufacturing difficulty increases
Solution Approach 1:
The patent combines the dual viewing field display function and anti-spy display function into a single display device by integrating a grating structure with the display screen. The grating is disposed directly on the display screen, allowing the same hardware to achieve multiple display modes (dual viewing field and anti-spy) through different operating states, thereby reducing overall system complexity despite the added grating component.
Solution Approach 2:
The display device is designed to perform multiple functions through a single grating structure. The grating can operate in different states to provide either dual viewing field display or anti-spy display functionality, making the device universal and multi-functional without requiring separate dedicated structures for each function.
2Object-affected harmful factors
If a grating is disposed in front of a display screen to achieve anti-spy display, then the normal display region is confined to a narrower region with frontal viewing angles, but the privacy protection capability is improved
Solution Approach 1:
The grating structure is designed to be movable relative to the display screen, allowing dynamic switching between different operational states. In the first state, the grating provides anti-spy display with narrow viewing angles for enhanced privacy protection. In the second state, the grating position changes to enable dual viewing field display with wider viewing angles, thus adapting to different privacy requirements.
Solution Approach 2:
The patent changes the relative position parameter between the grating and the display screen to switch between anti-spy mode and dual viewing field mode. By adjusting the grating's position (moving it by half a column width of sub-pixels), the device transitions between different viewing angle ranges and privacy protection levels, allowing flexible parameter optimization based on usage scenarios.
3Adaptability or versatility
If the relative position of the grating and display screen is fixed, then the manufacturing precision is easier to control, but the device cannot switch between dual viewing field display and anti-spy display modes
Solution Approach 1:
The grating is designed with movable capability relative to the display screen, enabling dynamic position adjustment between two specific states. This dynamic design allows the device to switch between anti-spy display mode and dual viewing field display mode, providing adaptability while maintaining manageable manufacturing precision through defined positional states.
Solution Approach 2:
The patent segments the grating's operational positions into distinct states (first state for anti-spy display, second state for dual viewing field display). By defining specific discrete positions rather than continuous adjustment, the manufacturing precision requirement is simplified while still achieving the desired mode switching capability.
4Adaptability or versatility
If the grating is moved to enable dual viewing field display, then the viewing field versatility is improved, but the device structure complexity increases
Solution Approach 1:
The patent merges the grating structure with the display screen assembly, where the grating is disposed directly on the display screen. This integration reduces the need for separate mounting structures and simplifies the overall device complexity while still enabling the grating to move between different positions for dual viewing field display.
Solution Approach 2:
The same movable grating structure serves multiple functions: it provides anti-spy display in one position and dual viewing field display in another position. This multi-functionality reduces the need for separate structures for different display modes, thereby limiting the increase in device structure complexity despite the added mobility capability.
Data Source
AI summary
A display device and driving method thereof are disclosed. The display device includes a display screen, including a plurality of sub-pixels arranged in the form of a matrix, colors of the sub-pixels in the same column including all colors necessary for display by the display screen; a grating disposed on top of the display screen, including light-transmissive regions and light-shading regions that are arranged alternately, the light-transmissive regions being in parallel to each column of the sub-pixels; a rolling structure, located between the display screen and the grating; and a push mechanism, for pushing the grating and/or the display screen, so that relative position of the grating and the display screen is switchable between a first state and a second state, and switchover between a dual viewing field display effect and an anti-spy display effect is achieved for the display device.