Dynamic Fluid Light Path Control for Privacy-Adaptive Displays
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Solution Overview
Problem
Display devices face challenges in accommodating both wide and narrow viewing angle modes, as existing technologies do not efficiently allow users to switch between these modes without compromising image quality or user privacy.
Innovation Solution
A display device with a light path control member that includes a housing with partition walls and channels, using a light absorbing solution that can be mechanically controlled to block or allow light transmission, enabling switching between wide and narrow viewing angles by filling or discharging the solution within the channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide viewing angle mode is provided, then image visibility is improved for multiple viewers, but user privacy is compromised and viewing angle control is lost
Solution Approach 1:
The patent applies a dynamic fluid control mechanism where a light-absorbing fluid can be pumped into or out of the optical path to dynamically switch between wide viewing angle mode (fluid removed) and narrow viewing angle mode (fluid inserted). This dynamic adjustment allows the system to adapt to different privacy requirements while maintaining viewing angle flexibility.
Solution Approach 2:
The patent utilizes hydraulic/pneumatic principles by employing a pump system to control the movement of light-absorbing fluid through channels in the optical path. The fluid can be pressurized to enter the optical path for privacy protection or depressurized to exit for wide viewing, providing mechanical control over the optical properties.
2Object-affected harmful factors
If a narrow viewing angle mode is implemented, then user privacy is protected, but image visibility for multiple viewers is reduced
Solution Approach 1:
The system dynamically adjusts the optical path by controlling fluid movement. When privacy protection is needed, the light-absorbing fluid is pumped into the optical path to create a narrow viewing angle. When privacy is less critical, the fluid is removed to restore wide viewing angle capability, allowing flexible adaptation to different situations.
Solution Approach 2:
The patent uses hydraulic control mechanisms with pumps and channels to precisely position the light-absorbing fluid. By controlling fluid pressure and flow, the system can reliably switch between narrow and wide viewing angle modes, ensuring privacy protection when needed while maintaining versatility.
3Adaptability or versatility
If a light absorbing solution is used to control viewing angle, then viewing angle switching is achieved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into the fluid control system. The same pump and channel structure serves both to insert the light-absorbing fluid for privacy mode and to remove it for wide viewing mode. The housing structure simultaneously provides mechanical support and defines the optical path, reducing the need for separate components.
Solution Approach 2:
The light-absorbing fluid acts as an intermediary element that mediates between the two viewing angle modes. Rather than requiring complex mechanical shutters or movable mirrors, the fluid serves as a controllable medium that can be positioned to either block or transmit light, simplifying the overall device structure while achieving the desired functionality.
4Adaptability or versatility
If partition walls with channels are used to contain light absorbing solution, then light path control is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs thin-film or flexible membrane structures for the partition walls containing the light-absorbing fluid. These thin structures can be manufactured with standard precision techniques and still effectively contain the fluid while allowing precise optical control. The flexibility of thin films also accommodates minor dimensional variations better than rigid structures.
Solution Approach 2:
The patent may utilize cost-effective manufacturing methods for the partition walls and channels, potentially using injection-molded plastic components or bonded thin films. These structures are designed to be manufactured with standard tolerances rather than requiring ultra-precision machining, reducing manufacturing complexity and cost while maintaining functional performance.
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
Enables user-selectable viewing angles, ensuring image visibility only to the intended viewer while maintaining image quality, by effectively limiting the viewing angle through the controlled light path, thus addressing the need for both wide and narrow viewing modes.
Implementation Method 1
a light absorbing solution configured to block transmission of light
Implementation Method 2
a first fluid transfer portion configured to control flowing of the light absorbing solution into and out of the channel
Data Source
AI summary
A display device includes a display panel; and a light path control member disposed on the display panel, wherein the light path control member includes: a housing including a plurality of partition walls and a channel defined between two adjacent partition walls among the plurality of partition walls; a light absorbing solution configured to block transmission of light; and a first fluid transfer portion configured to control flowing of the light absorbing solution into and out of the channel.