Anti-peep Display Device Using Segmented Light Sources
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Solution Overview
Problem
Conventional anti-peep films for electronic devices dim the screen luminance and reduce image quality, and they lack the ability to automatically determine when to activate or deactivate the anti-peep function.
Innovation Solution
An anti-peep display device with a light guide assembly, first and second light sources, and condensing portions that generate anti-peep beams with a narrow angle, overlapping with the display beam to block the large light-emitting angle without reducing the display surface luminance, and a control module to automatically activate the anti-peep function based on the presence of sensitive information in the image frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-peep film is installed on the screen to block light with larger angles, then the viewing angle is narrowed and anti-peep effect is achieved, but the luminance of the screen is dimmed and image quality is reduced
Solution Approach 1:
The patent segments the light control function by using multiple light sources (first and second light sources) positioned at different locations, each emitting light at specific angles to collectively block light from larger viewing angles while preserving forward luminance. This segmentation allows selective blocking of harmful light angles without uniformly dimming the entire screen.
Solution Approach 2:
The patent applies local quality by directing light from specific positions (first and second light sources) at specific angles to create localized anti-peep zones. The light guide assembly with its specific geometric structure (including the inclined surface and reflective surface) creates localized light blocking only where needed, preserving the luminance quality of the main display area while providing anti-peep protection at oblique angles.
2Object-affected harmful factors
If a conventional anti-peep film is used to block light, then anti-peep function is provided, but the contrast and sharpness are reduced
Solution Approach 1:
The patent segments the light blocking function into specific directional beams from multiple light sources, rather than using a uniform film that blocks all angles equally. This segmented approach allows precise control over which light paths are blocked, preserving the sharpness and contrast of the forward-directed display light while blocking only the oblique angles that cause peeping.
Solution Approach 2:
The patent replaces the passive mechanical film structure with an active optical system using light sources, light guides, and reflective surfaces. This substitution allows dynamic control of light paths and enables precise angular selection, maintaining image quality by avoiding the uniform light scattering and contrast reduction inherent in conventional anti-peep films.
3Ease of operation
If an anti-peep film is manually removed when not needed, then the inconvenience of use is reduced, but the automation and convenience are still insufficient
Solution Approach 1:
The patent implements self-service by enabling the anti-peep system to automatically activate and deactivate based on detected viewing conditions. The system monitors the environment and user behavior, then autonomously adjusts the anti-peep function without requiring manual intervention, making the system both convenient and highly automated.
Solution Approach 2:
The patent incorporates feedback mechanisms that detect viewing conditions (such as the presence of observers at oblique angles or environmental lighting conditions) and use this feedback to automatically control the activation state of the anti-peep function. This feedback loop enables the system to respond dynamically to changing conditions, providing both convenience and automation.
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
Maintains image quality by not reducing the display surface luminance while providing an effective anti-peep function and improving user convenience by automatically determining when to engage the anti-peep module.
Implementation Method 1
The optical microstructures are configured to reflect the anti-peep beams to the light exit surface
Implementation Method 2
The first condensing portion and the second condensing portion are configured to convert a plurality of beams provided by the first light source and the second light source into a plurality of anti-peep beams with a beam angle less than 10 degrees
Data Source
AI summary
An anti-peep display device includes a display module and an anti-peep module disposed on the display module. The anti-peep module includes the following features. The first light incident surface faces the display surface, the second and third light incident surfaces are located on opposite sides of the first light incident surface, the first condensing portion is disposed corresponding to the second light incident surface and the first light source, the second condensing portion is disposed corresponding to the third light incident surface and the second light source, the first and second condensing portions convert beams of the first and second light sources into anti-peep beams with a beam angle less than 10 degrees, and the optical microstructures reflect the anti-peep beams and exit the anti-peep beams from the light guide plate. The present invention also provides an anti-peep method applicable to the anti-peep display device.