Dual View Display Using Switchable Reflectors for Brightness and Orientation
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Solution Overview
Problem
Transparent panel displays that emit light from both sides often show images as mirror or reversed images on opposite sides, making it difficult to view text or asymmetrical objects, and multiplexing with shutter devices reduces image brightness.
Innovation Solution
A dual view display system using a transparent display with a first shutter device and a switchable reflective device, allowing light to pass through in one direction and reflecting it to supplement the other side, maintaining image orientation and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent display emits light from both sides, then the display can be viewed from either side, but the image on one side becomes a mirror image or reverse image of the opposite side
Solution Approach 1:
The display system is segmented into independent controllable sides with separate shutter devices (first shutter device 32 and second shutter device 34) that can independently control light transmission for each side, allowing distinct non-mirrored images to be displayed on opposite sides
Solution Approach 2:
The patent inverts the conventional approach by using reflective devices (first reflective device 36 and second reflective device 38) to reflect light back through the transparent display, creating properly oriented images on each side rather than mirror images, effectively reversing the optical path
2Adaptability or versatility
If shutter devices are used to display distinct images on each side, then separate images can be viewed from each side, but the brightness of the images is reduced
Solution Approach 1:
Reflective devices (first reflective device 36 and second reflective device 38) are introduced as intermediary elements between the transparent display and shutter devices, reflecting light back through the display to supplement the emitted light and increase image brightness without compromising the distinct image capability
Solution Approach 2:
The system merges light emitted directly from the transparent display with light reflected back through the display by the reflective devices, combining multiple light sources to enhance overall image brightness while maintaining distinct image display on each side
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 properly oriented images on opposite sides of the display with adjustable brightness, reducing the need for multiple displays and avoiding the brightness loss associated with multiplexing.
Implementation Method 1
The first switchable reflective device is operable to a reflective mode whereby light emitted in the first direction by the transparent display is reflected through the transparent display into the second direction. By this arrangement, the reflected light supplements light emitted in the second direction by the transparent display.
Implementation Method 2
The transparent display is configured to emit light from a first side in a first direction and emit light from a second side substantially opposite the first side in a second direction substantially opposite the first direction.
Implementation Method 3
The first shutter device is operable to a transparent mode whereby light emitted in the first direction by the transparent display passes through the first shutter device, and operable to an opaque mode whereby light emitted in the first direction by the transparent display is obstructed from passing through the first shutter device.
Data Source
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AI summary
A dual view or two-sided display system (10) to display two different images in substantially opposite direction using a single transparent display (20) to time-multiplex the images and two shutter devices (32) to alternately block each side (22,24) from being viewed according to the image being displayed. The system (10) includes reflective devices (36) between each side of the transparent display (20) and the two shutter devices (32) so light can be reflected from one side of the transparent display (20) to the other side of the transparent display (20) in order to supplement the light intensity of the image being displayed.