Anti-Peep Display Screen With Segmented LCD Light Control
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Solution Overview
Problem
Existing anti-peep display screens suffer from poor display quality and limited functionality due to their reliance on grating structures, which restrict viewing angles and impair image clarity when viewed from non-perpendicular positions.
Innovation Solution
Combining a passive LCD module with a color LCD module, utilizing independent first and second sub-electrodes to control light transmission states, allowing for adjustable anti-peep functionality while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If grating structures with spacing between 0.02 mm and 0.1 mm are used to achieve anti-peep effect, then anti-peep function is realized, but display quality deteriorates and viewing angle becomes limited
Solution Approach 1:
The display screen is divided into multiple independent sub-electrodes (first sub-electrodes and second sub-electrodes) that can be independently controlled. This segmentation allows different regions to have different light transmission states, enabling the anti-peep function to be selectively activated in specific areas without affecting the overall display quality of the entire screen.
Solution Approach 2:
The patent introduces a control mechanism that dynamically adjusts the light transmission state of the passive LCD module by applying different voltages to sub-electrodes. This dynamic control allows the anti-peep function to be activated or deactivated as needed, and enables flexible control over different screen regions, resolving the contradiction between having anti-peep protection and maintaining good display quality.
2Object-affected harmful factors
If grating structures are used for anti-peep effect, then screen content is protected from peeping, but the anti-peep function becomes single and inflexible
Solution Approach 1:
The screen is segmented into multiple controllable regions through independent sub-electrodes, allowing different areas to have different anti-peep states simultaneously. This enables versatile functionality where the anti-peep protection can be applied selectively to specific regions while leaving other regions with normal viewing capabilities.
Solution Approach 2:
The control module enables dynamic switching of anti-peep function activation and deactivation, and allows flexible control over different screen regions. This dynamic adaptability resolves the contradiction by making the anti-peep function versatile and adaptable to different usage scenarios rather than being a fixed, single-mode feature.
3Adaptability or versatility
If passive LCD module with sub-electrodes is added to control light transmission, then anti-peep functionality is enhanced, but device complexity increases
Solution Approach 1:
The patent combines the passive LCD module with the active color LCD module into a single integrated display structure. The passive LCD module serves as a control layer that modulates light transmission for the color LCD module, merging anti-peep functionality with color display capabilities in one unified device, thereby enhancing functionality without proportionally increasing complexity.
Solution Approach 2:
The passive LCD module with independently controllable sub-electrodes serves multiple functions: it controls light transmission for the color LCD module, provides anti-peep protection, and enables flexible regional control. This multi-functionality resolves the contradiction by achieving enhanced anti-peep functionality while keeping the overall device structure relatively compact and integrated.
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
Enhances image display quality and flexibility in anti-peep functionality, enabling independent control of anti-peep modes across different areas of the screen.
Implementation Method 1
By regulating the voltage difference between the first sub-electrode and the second sub-electrode, the deflection angle of the liquid crystal molecules in the liquid crystal layer can be controlled, thereby controlling the transmission state of the passive LCD module
Implementation Method 2
a compensation film is disposed between the two passive LCD modules. The compensation film is a half-wave plate
Data Source
AI summary
Provided is an anti-peep screen, including a passive LCD module and a color LCD module stacked along a first direction; the passive LCD module includes a first electrode layer, a liquid crystal layer and a second electrode layer, the first electrode layer comprises a first sub-electrode, the second electrode layer comprises a second sub-electrode, and the first sub-electrode is opposite to the second sub-electrode and configured to input different voltages, so as to control a light transmission state of the passive LCD module. The anti-peep display screen of the present application solves the problems of poor display effect and single anti-peep function of existing anti-peep display screens by introducing a passive LCD module. Also provided is a vehicle-mounted display device and a vehicle.