Anti-Peep Light Guide Module With Angled Microstructures
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Solution Overview
Problem
Existing anti-peep display technologies compromise image quality or are inconvenient to use, as they either reduce brightness for normal viewers or fail to fully shield images from bystanders due to limited viewing angles and brightness adjustments.
Innovation Solution
An anti-peep light source module with a light guide plate and optical microstructures that reflect anti-peep light beams at specific angles, ensuring bystanders see a high-brightness image while normal viewers maintain optimal image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-peep optical sheet with ultra-fine fence structures is added to block large-angle light, then privacy protection is improved, but screen brightness and sharpness are reduced
Solution Approach 1:
The patent extracts the anti-peep function from the traditional optical sheet approach and implements it through a dedicated light source module that emits anti-peep light beams separately from the display light beams. This separation allows the anti-peep function to operate independently without affecting the display quality and brightness for normal viewers.
Solution Approach 2:
The patent applies local quality by directing anti-peep light beams specifically toward bystander viewing angles while maintaining normal display light emission toward the user's viewing angle. The anti-peep light source module is positioned and configured to emit light only in specific directions, ensuring that privacy protection is applied locally to where it is needed without affecting the overall display quality.
2Object-affected harmful factors
If a liquid crystal viewing angle switcher is added to control light transmittance at different angles, then privacy protection is improved, but display quality is reduced due to brightness reduction and image interference
Solution Approach 1:
The patent extracts the anti-peep function from the display optical path and implements it through a separate anti-peep light source module. This module emits anti-peep light beams independently from the display light beams, allowing the display system to maintain its original optical path and avoid the image interference and quality degradation caused by liquid crystal viewing angle switchers.
3Object-affected harmful factors
If an anti-peep optical module is added to shield images from bystanders, then privacy protection is improved, but the module is inconvenient to carry and affects the aesthetic design
Solution Approach 1:
The patent merges the anti-peep light source module with the existing display device structure, integrating it into the housing or frame of the display device. This integration approach allows the anti-peep function to be incorporated without adding separate bulky components, thereby maintaining the device's portability and aesthetic design while providing effective privacy protection.
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 solution provides effective privacy protection without affecting normal viewers' image quality by reflecting anti-peep light beams at angles that shield images from bystanders, ensuring they see a nearly white image while users at the normal viewing angle experience no reduction in brightness or interference.
Implementation Method 1
a plurality of optical microstructures are disposed on the first surface... there is a first included angle between the first optical surface of each of the optical microstructures and the first surface, there is a second included angle between the second optical surface and the first surface, and a magnitude of the first included angle and a magnitude of the second included angle gradually change as getting farther away from the first surface
Data Source
AI summary
An anti-peep light source module and an anti-peep display device having an anti-peep function and good image quality are provided. The anti-peep light source module includes a light guide plate, a first light emitting element, a second light emitting element, a plurality of optical microstructures and a first surface. The light guide plate has a first light incident surface and a second light incident surface. Each of the optical microstructures has a first optical surface facing the first light incident surface and a second optical surface facing the second light incident surface. A magnitude of a first included angle between the first optical surface and the first surface and a magnitude of a second included angle between the second optical surface and the first surface gradually change as getting farther away from the first surface.