Mixed-Format Backlight Multiview and 2D Zones
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Solution Overview
Problem
Passive electronic displays, which do not emit light, are limited in practical applications due to their inability to emit light, and often require an external light source for functionality, which can be inefficient.
Innovation Solution
A mixed-format backlight system that combines a multiview zone and a two-dimensional zone, using an array of multibeam emitters and a light guide to provide directional and broad-angle emitted light, respectively, allowing for simultaneous display of multiview and 2D images without the need for external illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If passive displays are coupled to an external light source, then the display can emit light and function substantially as an active display, but the device complexity and loss of energy increase
Solution Approach 1:
The patent combines the backlight function directly into the display structure by integrating light-emitting elements (such as LEDs or OLEDs) within the display panel itself. This merging eliminates the need for separate external light sources while maintaining the ability to emit light, thus reducing device complexity and energy loss associated with external coupling.
Solution Approach 2:
The display structure is designed to perform multiple functions: it serves as both the light-emitting element and the display medium. The light-emitting elements are integrated within the display panel to provide illumination for the display content, making the display unit self-sufficient without requiring external backlighting systems.
2Adaptability or versatility
If a single uniform backlight is used, then the device complexity is low, but the adaptability to display different image formats (multiview and 2D) is limited
Solution Approach 1:
The backlight is divided into multiple functional zones: a multiview zone with light-emitting elements arranged to provide directional light for multiview display, and a 2D zone with light-emitting elements arranged for broad-angle illumination. This segmentation allows each zone to be optimized for its specific display format while maintaining overall system adaptability.
Solution Approach 2:
Different regions of the backlight are assigned different emission characteristics: the multiview zone provides directional light emission optimized for multiview display, while the 2D zone provides broad-angle emission optimized for traditional 2D displays. This local differentiation of emission properties enables the single backlight to support multiple image formats simultaneously.
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 electronic displays that can provide both multiview and 2D images without external light sources, enhancing their practicality and efficiency by utilizing a dual-zone backlight configuration.
Implementation Method 1
a light guide configured to guide the light as guided light
Implementation Method 2
a light emitting element configured to emit the light
Data Source
AI summary
A mixed-format backlight and display employ a multiview zone to provide directional emitted light corresponding to a multiview portion of a mixed-format displayed image and a two-dimensional (2D) zone to provide broad-angle emitted light corresponding to a 2D portion of the mixed-format displayed image. A size of a multibeam emitter of the multiview zone is comparable to a size of a light valve of the mixed-format display.