Transparent Backlight Assembly Light Refraction Features
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Solution Overview
Problem
Conventional mobile devices with multiple displays face limitations in functionality when the primary display is closed, and users desire both compactness and larger interface surfaces, which is challenging to achieve with existing rotating hinges and hardware components.
Innovation Solution
A transparent display backlight assembly that includes a light source and a backlight panel with light refraction features, such as light-scattering particles or diffractive optics, to illuminate a display panel, allowing for transparent and non-transparent modes, and enabling a multi-mode panel to switch between display modes for optimal visibility and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a smaller, secondary display is implemented on the back of the device, then the device can display information when closed, but the device functions are limited or disabled when the primary display is closed
Solution Approach 1:
The display panel is designed to serve multiple functions: it acts as both a primary display when open and a secondary display when closed, eliminating the need for separate display components and maintaining full device functionality in both states
2Adaptability or versatility
If rotating hinges and hardware components are added to position the display screen for use while open or closed, then the device can be used in multiple orientations, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical rotating hinges with a flexible display panel that can be bent or folded, eliminating the need for mechanical positioning components while maintaining the ability to display information in multiple orientations
3Reliability
If light refraction features are added to the backlight panel to improve transparency, then the backlight panel transparency increases, but the light scattering and illumination efficiency may be affected
Solution Approach 1:
The backlight panel incorporates light refraction features at specific locations and densities to create local variations in light transmission, allowing certain areas to be more transparent while others provide stronger illumination, optimizing both transparency and illumination efficiency
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 a portable device to maintain functionality and visibility in both open and closed positions while minimizing size, with enhanced light efficiency and transparency, allowing users to interact with the device seamlessly across various orientations.
Implementation Method 1
Light refraction features refract and scatter the light
Implementation Method 2
Light refraction features refract and scatter the light
Implementation Method 3
light-scattering particles embedded in the backlight panel
Implementation Method 4
diffractive optics that refract designated light wavelengths
Implementation Method 5
negative prisms formed into the backlight panel, where the negative prisms can be implemented as nano-prisms that increase the transparency of the backlight panel, or as micro-prisms that increase display panel illumination
Data Source
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AI summary
In embodiments of a transparent display backlight assembly, a backlight panel is operable as a transparent panel, and a light source generates light that the backlight panel directs from the light source to illuminate a display panel of a display device. Light refraction features refract and scatter the light, where the light refraction features are spaced for approximate transparency of the backlight panel and to illuminate the display panel. An active diffuser can be implemented as an additional transparent panel and operable for activation to diffuse the light from the backlight panel that illuminates the display panel.