Multiview Backlight Diffuser Active Emitter Arrays
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Solution Overview
Problem
Passive electronic displays, such as LCDs, lack the ability to emit light, limiting their practical applications due to their inherent low power consumption and limited use in various applications.
Innovation Solution
A multiview backlight system employing an array of active emitters and a diffuser to selectively diffuse light, allowing for directional light beams that correspond to different view directions, enabling a multiview display to switch between multiview and 2D modes by activating different emitter arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If passive displays like LCDs are used, then power consumption is low, but the ability to emit light is limited
Solution Approach 1:
The patent combines passive display technology with active light-emitting elements (such as LEDs or OLEDs) to create a hybrid display system. The active emitter array integrated with the passive display structure enables light emission while maintaining the low power consumption characteristics of passive displays, resolving the contradiction between power efficiency and light emission capability
Solution Approach 2:
The display system is designed to perform multiple functions: it can operate as a traditional passive display for low-power viewing and simultaneously function as an active light-emitting display for enhanced visibility and multiview capabilities. This multi-functionality allows the same device to adapt to different power and light emission requirements
2Adaptability or versatility
If active emitter arrays are used to provide multiview capability, then viewing angle is improved, but device complexity increases
Solution Approach 1:
The active emitter array is divided into multiple independent emitter elements arranged in specific patterns. Each emitter can be independently controlled to provide light beams at different angular directions, enabling multiview capability through segmentation of the emission function across multiple simple units rather than a single complex system
Solution Approach 2:
A diffuser element is introduced as an intermediary component between the active emitter array and the viewer. The diffuser scatters and redistributes the light from the emitter array to create multiple viewing angles and perspectives, simplifying the overall system architecture by using a passive optical element to achieve what would otherwise require complex active control mechanisms
3Adaptability or versatility
If multiple emitter arrays are activated for different modes, then display versatility is improved, but control complexity increases
Solution Approach 1:
The display system dynamically switches between different operational modes by selectively activating different emitter arrays or subsets of emitters. The control system adjusts the emission characteristics in real-time based on the desired display mode (e.g., multiview, 2D, or other configurations), enabling versatile functionality through dynamic reconfiguration rather than fixed complex architecture
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 the creation of a multiview display that provides different perspectives of an image from various angles, enhancing its applicability in devices like smartphones, computers, and automobile consoles, while maintaining low power consumption.
Implementation Method 1
a diffuser configured to diffuse the emitted light from an active emitter of the active emitter array
Data Source
AI summary
A multiview backlight, multiview display, and method employ arrays of active emitters and a diffuser to provide an effective active emitter from emitted light from each active emitter. The multiview backlight includes an array of active emitters and a diffuser configured to provide effective active emitters having a predetermined size that is between one quarter and two times a size of a light valve of the multiview display. The multiview display includes an array of effective active emitters including active emitters and a diffuser configured to provide output emitted light. The multiview display further includes an array of light valves configured to modulate output emitted light to provide a displayed image. A spacing between effective active emitters is an integer multiple of a spacing between light valves of the multiview display.