Dual-Sided Display Using Bottom and Top Emission LEDs
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Solution Overview
Problem
Current displays are typically one-sided, limiting their functionality when the device is closed, as they cannot emit information in multiple directions without increasing device thickness or cost by using separate displays.
Innovation Solution
A dual-sided display is fabricated on a single substrate, where a first portion emits light towards the user and a second portion emits light both towards and away from the user, utilizing a combination of bottom emission (BE) and top emission (TE) LEDs, allowing for simultaneous image generation in multiple directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate displays are used to provide information when the device is closed, then information display capability is improved, but device thickness and manufacturing cost increase
Solution Approach 1:
The patent combines two separate display functions (front display and back display) into a single display device. The display unit is configured to display information on both the front surface and back surface simultaneously, eliminating the need for two separate displays and thereby reducing device thickness while maintaining dual-sided information display capability.
Solution Approach 2:
The single display unit is designed to perform multiple functions: displaying information to the user when the device is open (front display) and displaying information when the device is closed (back display). This multi-functional design allows one display to replace what would traditionally require two separate displays.
2Adaptability or versatility
If two separate displays are used to provide information when the device is closed, then information display capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the functionality of two separate displays into a single display unit, which reduces manufacturing costs by eliminating the need to procure, assemble, and maintain two separate display components. The single display unit is integrated into the device housing to provide dual-sided display functionality.
Solution Approach 2:
The display unit is designed as a universal component that serves both front display and back display functions, reducing overall system complexity and manufacturing cost compared to using two specialized displays.
3Length of stationary object
If a single substrate is used for dual-sided display, then device thickness is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent integrates both front and back display functionalities into a single substrate, which reduces device thickness by eliminating the need for separate display assemblies. The single substrate is configured with light-emitting structures that can emit light from both front and back surfaces, simplifying the overall device architecture despite the specialized manufacturing requirements.
4Adaptability or versatility
If bottom emission and top emission LEDs are combined, then dual-sided light emission is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies different light emission characteristics to different regions of the display unit. Bottom emission LEDs are used in areas where light needs to travel through the substrate to the front, while top emission LEDs are used where light needs to emit directly from the back surface. This localized differentiation allows the system to achieve dual-sided emission while managing manufacturing precision requirements through region-specific design.
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 information display on a single device when closed, reducing thickness and cost by integrating dual-sided functionality into a single display, enhancing user interaction and functionality without adding separate displays.
Implementation Method 1
a first portion of the display may be a single-sided display (e.g., emits light or images towards a user)
Implementation Method 2
A second portion of the display may be a dual-sided display that can emit light or images in a first direction towards a user and in a second direction that is opposite the first direction, away from the user
Data Source
AI summary
In example implementations, a display is provided. The display includes a first portion and a second portion. The first portion includes a first plurality of light emitting diodes (LEDs) that emit light in a first direction. The second portion includes a combination of the first plurality of LEDs that emit light in the first direction and a second plurality of LEDs that emit light in a second direction that is opposite the first direction to form a dual-sided display.