Backlight Interference Light Source for Anti-Photographing
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Solution Overview
Problem
Current display technologies lack an effective solution to prevent displayed content from being photographed by strangers while allowing users to view the information properly, as existing solutions do not adequately address the issue of surreptitious photographing.
Innovation Solution
Incorporating interference light sources that generate invisible light detectable by photographing devices but not visible to users, which are integrated with backlight sources and disposed around display panels to interfere with photographing attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference light sources generating invisible light are added to prevent surreptitious photographing, then security against photographing is improved, but device complexity increases
Solution Approach 1:
The interference light source is integrated with the existing backlight structure by disposing it on the same light bar as the edge-type backlight source. This merging approach allows the anti-photographing function to be added without requiring a completely separate system, thereby improving security while minimizing the increase in device complexity.
Solution Approach 2:
The light bar structure is designed to accommodate both the edge-type backlight source for normal display illumination and the interference light source for anti-photographing protection. This multi-functional design allows a single component to serve multiple purposes, addressing the technical contradiction by improving security functionality while avoiding proportional increases in overall device complexity.
2Reliability
If interference light sources are disposed on the light bar with backlight sources, then anti-photographing function is achieved, but manufacturing complexity increases
Solution Approach 1:
Both the backlight source and interference light source are disposed on the same light bar structure, merging two functions into a single mounting platform. This integration simplifies the manufacturing process compared to having separate mounting structures, as it reduces the number of assembly steps and components while achieving the anti-photographing function.
Solution Approach 2:
The light bar is pre-designed with positioning structures that accommodate both the edge-type backlight source and the interference light source. By preparing the mounting structure in advance with integrated positioning features, the patent facilitates easier assembly during manufacturing, thereby reducing manufacturing complexity while maintaining the anti-photographing functionality.
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 effectively prevents surreptitious photographing by ensuring the interference light is undetectable to users while being detectable by photographing devices, thus protecting user privacy and ensuring safe viewing.
Implementation Method 1
The interference light sources and the edge-type backlight sources are disposed on the first light bar spaced from one another and along a direction of a long side of a plane of the first light bar, the plane being opposed to the light guide plate. The invisible light from the interference light source passes through the light guide plate and reaches the liquid crystal display panel.
Data Source
AI summary
The present disclosure discloses a display apparatus, a backlight source, and a light source module. The display apparatus includes a display panel and interference light sources which generate interference light on a display side of the display panel. The interference light is invisible light.