Backlight Module With Sunken Eye Structures For Anti-Peeping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight modules for liquid crystal displays often compromise image quality by reducing light emitting brightness to provide anti-peeping functions, which is not satisfactory for modern electronic products used in daily life and public places.
Innovation Solution
A backlight module design incorporating a light guide assembly with multiple light guide plates and an inverse prism sheet, allowing for adjustable light emitting angles and brightness without reducing overall brightness, achieved through the use of first, second, and third light guide plates with sunken eye structures and an inverse prism sheet to control light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light emitting brightness of the backlight module is reduced to provide anti-peeping functions, then the peeping prevention capability is improved, but the image quality of the screens deteriorates
Solution Approach 1:
The patent applies local quality by creating sunken eye structures at specific locations on the light guide plates. These localized structural modifications control the light emission angle in specific regions without affecting the overall brightness of the backlight module. The sunken eye structures are positioned to redirect light at particular angles, providing anti-peeping functionality only where needed while preserving image quality in other areas.
Solution Approach 2:
The patent introduces a new dimensional approach by using sunken eye structures that modify light propagation in the angular dimension rather than reducing light intensity. Instead of simply lowering brightness to prevent peeping, the invention changes the spatial distribution of light by creating recesses that redirect light at specific angles, thus achieving anti-peeping through geometric control rather than intensity reduction.
2Object-affected harmful factors
If the light emitting angle of the backlight module is reduced to provide anti-peeping functions, then the peeping prevention capability is improved, but the light emitting brightness deteriorates
Solution Approach 1:
The sunken eye structures are implemented as localized features on the light guide plates, affecting only specific angular regions of light emission. This localized modification redirects light at oblique angles to prevent peeping while leaving the central viewing angle brightness intact, thus achieving angle control without overall brightness loss.
Solution Approach 2:
The patent segments the light emission control by using multiple separate sunken eye structures on different light guide plates (first, second, and third light guide plates). Each structure independently controls light at its specific location, allowing selective angular control without uniformly reducing brightness across the entire backlight module.
3Adaptability or versatility
If multiple light guide plates with different light emitting angles are used to provide multiple visual angles switching, then the visual angle adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent divides the backlight module into multiple independent light guide plates (first, second, and third light guide plates), each with its own sunken eye structures configured for different light emitting angles. This segmentation allows each plate to be optimized for a specific visual angle, and the system can switch between angles by activating different plates or combinations thereof.
Solution Approach 2:
The patent implements dynamic visual angle switching capability by configuring multiple light guide plates with different sunken eye structure orientations. The system can dynamically adjust the effective light emitting angle by controlling which light guide plates are active, allowing adaptation to different viewing requirements without physical reconfiguration of the entire module.
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
Enables multiple visual angle switching and reduces light emitting angles effectively, enhancing image quality and anti-peeping functionality without compromising brightness, making it suitable for various electronic products.
Implementation Method 1
an inverse prism sheet, and a light guide assembly. The light guide assembly is disposed opposite to the inverse prism sheet
Implementation Method 2
The first surface is formed with a first sunken eye structure, and the first sunken eye structure has two first eye corner portions opposite to each other
Data Source
AI summary
A backlight module includes three light emitting elements, an inverse prism sheet and a light guide assembly. The light guide assembly is disposed opposite to the inverse prism sheet and includes three light guide plates. A first surface of the first light guide plate opposite to the inverse prism sheet has a first sunken eye structure having a first long axis extending along a reference direction. A second surface of the second light guide plate opposite to the inverse prism sheet has a second sunken eye structure having a second long axis. A third surface of the third light guide plate opposite to the inverse prism sheet has a third sunken eye structure having a third long axis. Orthographic projections of the second long axis and the third long axis on the first surface are inclined towards two opposite sides of the reference direction.