Reflective 3D Display Device Removing Backlight Unit
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Solution Overview
Problem
Conventional transmissive-type 3-D display devices suffer from issues such as large noise, high power consumption, weight, and volume due to their design, which limits their effectiveness in providing a stereoscopic view.
Innovation Solution
A reflective-type display device is developed, comprising a first panel with a light-blocking layer, lower and upper substrates, and an electro-optic layer that reflects polarized light signals, along with an image dividing sheet that converts circularly polarized light into separate images for each eye, using a spatial or temporal dividing method to create distinct viewing angles, thereby reducing the need for a backlight unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transmissive-type display device is used to provide 3-D images, then stereoscopic viewing capability is achieved, but power consumption increases due to the backlight unit
Solution Approach 1:
The patent inverts the conventional transmissive display approach by using a reflective-type display device. Instead of transmitting light from a backlight through the display panel, the invention reflects ambient or front-light onto the display panel, eliminating the need for a backlight unit and significantly reducing power consumption while maintaining 3-D stereoscopic viewing capability through spatial or temporal division methods
Solution Approach 2:
The patent extracts and removes the backlight unit from the display system. By eliminating this energy-consuming component and replacing it with a reflective architecture using polarizing beamsplitters and liquid crystal panels, the system achieves 3-D functionality without the power penalty associated with backlight illumination
2Reliability
If a transmissive-type display device with backlight unit is used, then 3-D image display is achieved, but device volume increases
Solution Approach 1:
The patent extracts and removes the bulky backlight unit from the display system. By replacing it with a reflective architecture using polarizing beamsplitters and liquid crystal panels, the system achieves 3-D functionality with a more compact form factor, significantly reducing overall device volume
Solution Approach 2:
The patent inverts the conventional transmissive display approach by using a reflective-type display device. This architectural inversion eliminates the need for a thick backlight assembly, allowing for a thinner and more compact display device while maintaining 3-D stereoscopic viewing capability
3Reliability
If a transmissive-type display device is used, then 3-D stereoscopic view is provided, but device weight increases
Solution Approach 1:
The patent extracts and removes the heavy backlight unit from the display system. By replacing it with a reflective architecture using polarizing beamsplitters and liquid crystal panels, the system achieves 3-D functionality with significantly reduced weight, making the device more portable and easier to handle
Solution Approach 2:
The patent inverts the conventional transmissive display approach by using a reflective-type display device. This architectural inversion eliminates the need for a heavy backlight assembly, resulting in a lighter display device while maintaining 3-D stereoscopic viewing capability
4Reliability
If a transmissive-type display device with backlight unit is used, then 3-D images are displayed, but device thickness increases
Solution Approach 1:
The patent extracts and removes the thick backlight unit from the display system. By replacing it with a reflective architecture using polarizing beamsplitters and liquid crystal panels, the system achieves 3-D functionality with a thinner profile, making the device more sleek and space-efficient
Solution Approach 2:
The patent inverts the conventional transmissive display approach by using a reflective-type display device. This architectural inversion eliminates the need for a thick backlight assembly, resulting in a thinner display device while maintaining 3-D stereoscopic viewing capability
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
The solution results in a 3-D display device with reduced volume, weight, and power consumption, while maintaining enhanced image quality and stereoscopic viewing capabilities.
Implementation Method 1
The electro-optical layer reflects a polarized light signal
Implementation Method 2
The first optical element converts the reflected polarized light signal into a first light corresponding to the first image signal
Implementation Method 3
The second optical element converts the reflected polarized light signal into a second light corresponding to the second image signal
Data Source
AI summary
The present invention relates to a display device having an image-emitting panel and an image dividing sheet. The image-emitting panel includes a light-blocking layer, a lower substrate, an upper substrate and an electro-optic layer. The lower substrate includes pixel electrodes into which a first image signal and a second image signal having different viewing angles are applied in a spatial dividing method. The electro-optic layer reflects a circularly polarized light towards the upper substrate. The image dividing sheet includes a first optical element and a second optical element. The first optical element converts the circularly polarized light into a first light corresponding to the first image signal. The second optical element converts the circularly polarized light into a second light corresponding to the second image signal.