Dye Liquid Crystal Display for Single-Side Peep-Proof Viewing
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Solution Overview
Problem
Existing liquid crystal display devices struggle to achieve a single-sided narrow viewing angle while maintaining a wide viewing angle on the opposite side, with current methods either fixing the viewing angle or compromising brightness and manufacturing complexity.
Innovation Solution
A liquid crystal display device comprising a backlight plate, lower and upper polarizers, and a dye liquid crystal panel with specific alignment and electric field configurations to control light transmission based on applied voltages, allowing for a single-sided peep-proof mode and wide viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a peep-proof film is attached to the display screen to achieve narrow viewing angle, then peep-proofing is realized at a specific direction, but the wide viewing angle display cannot be restored and the structure becomes more complex
Solution Approach 1:
The patent merges the peep-proofing function with the liquid crystal display panel by integrating a peep-proof liquid crystal layer and peep-proof driving electrodes directly into the display structure. This eliminates the need for separate peep-proof films while achieving the same privacy protection effect, thereby reducing structural complexity.
Solution Approach 2:
The liquid crystal display panel is designed to perform multiple functions: normal display and peep-proofing. By using the same display panel structure for both functions through voltage control, the invention avoids adding separate components, thus reducing overall device complexity while maintaining peep-proofing capability.
2Adaptability or versatility
If dual light source backlight system is used to adjust display viewing angle, then switching between wide and narrow viewing angle is realized, but the function of achieving wide viewing angle at one certain angle and narrow viewing angle at another angle simultaneously cannot be achieved
Solution Approach 1:
The patent uses voltage-controlled liquid crystal orientation to dynamically adjust the viewing angle characteristics. By applying different voltages to the peep-proof driving electrodes, the liquid crystal molecules reorient themselves, enabling the display to switch between wide viewing angle mode and single-side narrow viewing angle mode without mechanical moving parts or complex optical systems.
Solution Approach 2:
The invention changes the electrical parameters (voltage applied to peep-proof driving electrodes) to control the optical properties of the liquid crystal layer. By varying the voltage, the display can achieve different viewing angle states, eliminating the need for dual light source backlight systems while maintaining adaptability.
3Adaptability or versatility
If two types of driving electrodes are set on the panel to realize viewing angle switching, then switching between wide and narrow viewing angle is achieved, but the panel brightness decreases and manufacture processing becomes complicated
Solution Approach 1:
The patent segments the driving electrode function into two independent sets: normal driving electrodes for standard display operation and peep-proof driving electrodes for privacy protection mode. This segmentation allows each electrode type to be optimized for its specific function, maintaining brightness during normal operation while enabling peep-proofing when needed, without requiring both electrode types to be always active.
Solution Approach 2:
The peep-proof driving electrodes are activated only when peep-proofing is required, rather than being continuously active. This partial action approach maintains normal display brightness during standard operation while providing the ability to switch to narrow viewing angle mode when privacy protection is needed, avoiding the brightness reduction that would occur if both electrode systems operated simultaneously.
4Adaptability or versatility
If two types of driving electrodes are set on the panel to realize viewing angle switching, then switching between wide and narrow viewing angle is achieved, but the manufacture processing becomes complicated
Solution Approach 1:
The patent segments the driving electrode function into two independent sets: normal driving electrodes for standard display operation and peep-proof driving electrodes for privacy protection mode. This segmentation allows each electrode type to be optimized for its specific function, maintaining brightness during normal operation while enabling peep-proofing when needed, without requiring both electrode types to be always active.
Solution Approach 2:
The liquid crystal display panel is designed to perform multiple functions: normal display and peep-proofing. By using the same display panel structure for both functions through voltage control, the invention avoids adding separate components, thus reducing overall device complexity while maintaining peep-proofing capability.
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 device achieves a better peep-proofing effect at a specific angle with normal viewing on the opposite side, enhancing privacy protection without compromising brightness or manufacturing complexity.
Implementation Method 1
Due to the effect of optical anisotropy of liquid crystal molecules, the viewing angle of liquid crystal display is smaller than the viewing angle of cathode ray tube display
Implementation Method 2
Liquid crystal display panels need to adjust the arrangement of liquid crystal molecules to change the polarization state of the transmitted light
Implementation Method 3
a dye liquid crystal panel comprising a first substrate, a first conductive layer, a dye liquid crystal layer, and a second substrate; and the dye liquid crystal layer comprises a second liquid crystal composition and dye molecules
Implementation Method 4
Liquid crystal display panels need to adjust the arrangement of liquid crystal molecules to change the polarization state of the transmitted light and to further realize the display function
Data Source
AI summary
The present invention provides a single-side peep-proof liquid crystal display device. The liquid crystal display device of the present invention sequentially comprises, along the light emergent side, a backlight plate, a lower polarizer, a display panel, an upper polarizer and a dye liquid crystal panel; the display panel comprises at least one substrate, at least one conductive layer, and a layer of a first liquid crystal composition; the dye liquid crystal panel comprises a first substrate, a first conductive layer, a dye liquid crystal layer, and a second substrate; and the dye liquid crystal layer comprises a second liquid crystal composition and dye molecules. The liquid crystal display device of the present invention has a better peep-proofing effect in the single-side viewing angle peep-proofing mode, and has a better wide viewing angle on the opposite side, and in the wide viewing angle mode, it has a better viewing angle display effect.