Parallax Device Grating Segmentation for 3D Display Thickness Reduction
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Solution Overview
Problem
Conventional 3D display devices with parallax devices require a specific viewing distance, which can lead to increased thickness and interfere with the goal of creating lighter and slimmer display devices due to the need for a minimum distance between the parallax device and the display panel.
Innovation Solution
A parallax device comprising a first grating unit and a second grating unit, where the second grating unit is arranged perpendicular to the display panel and includes third barriers that prevent light interference, allowing the first grating unit to be closer to the display panel, thereby reducing the overall thickness and enabling a lighter and slimmer design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the parallax device is placed close to the display panel to reduce thickness, then the device becomes lighter and slimmer, but light interference occurs between different viewing regions
Solution Approach 1:
The patent divides the grating structure into two separate units: a first grating unit for directing light to viewing regions and a second grating unit for preventing light interference. This segmentation allows each unit to perform its specific function independently, enabling the parallax device to be placed close to the display panel while maintaining effective light control and preventing interference between different viewing regions.
Solution Approach 2:
The second grating unit acts as an intermediary element between the first grating unit and the viewing regions. It mediates the light paths by blocking interfering light while allowing desired light to pass through, thus enabling close placement of the parallax device without causing light interference issues.
2Device complexity
If a single grating unit is used, then the structure is simpler, but light from one viewing region interferes with another viewing region
Solution Approach 1:
The patent segments the grating function into two distinct units: the first grating unit for light direction and the second grating unit for interference prevention. This segmentation, while increasing structural complexity, effectively eliminates viewing region interference by assigning specific functions to each unit, with the second unit specifically designed to block interfering light paths.
Solution Approach 2:
The second grating unit provides a self-service function by automatically blocking interfering light paths without requiring additional active control mechanisms. Its periodic structure inherently creates shadow regions that prevent light from entering incorrect viewing regions, thus self-regulating the light distribution.
3Object-affected harmful factors
If the first grating unit is placed far from the display panel to avoid light interference, then viewing quality is maintained, but the overall device thickness increases
Solution Approach 1:
The second grating unit serves as an intermediary that enables close placement of the first grating unit to the display panel. By positioning the second grating unit between the first grating unit and the viewing regions, it mediates the light paths and prevents interference, thus allowing the first grating unit to be placed close to the display panel without compromising viewing quality.
Solution Approach 2:
The patent introduces a new spatial dimension by stacking two grating units in the thickness direction rather than spreading them out laterally. This dimensional change allows interference prevention to be achieved through vertical arrangement, enabling close placement of the parallax device to the display panel while maintaining effective light control.
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 effectively prevents light interference, allowing the parallax device to be positioned closer to the display panel, resulting in a thinner and more compact 3D display device without compromising the 3D viewing experience.
Implementation Method 1
The third barriers are configured to prevent light transmitted through the first gaps from entering a predetermined left-eye viewing region and enable at least a portion of the light transmitted through the first gaps to enter a predetermined right-eye viewing region, and prevent light transmitted through the second gaps from entering the predetermined right-eye viewing region and enable at least a portion of the light transmitted through the second gaps to enter the predetermined left-eye viewing region
Data Source
AI summary
The present application relates to the field of 3D display technique, and provides a parallax device and a 3D display device. The parallax device includes a first grating unit and a second grating unit. The first grating unit includes first barriers and second barriers arranged alternately. The second grating unit includes third barriers that are in one-to-one correspondence with the first barriers. The third barriers are configured to prevent light transmitted through the first grating unit from entering and interfering with a viewing region.