3D Display Surface-Light Source Sequential Direction Adjustment
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Solution Overview
Problem
Current three-dimensional (3D) image display technologies, such as stereoscopic methods, are limited in providing a stable 3D image view as they only offer images from two viewpoints, making it difficult for viewers to maintain a clear 3D image when moving their heads, and require additional accessories like glasses.
Innovation Solution
A 3D image display apparatus that uses a surface-light source device with a light source unit comprising multiple point light sources, a light guide plate, and an inverse prism sheet to emit light in a direction adjusted sequentially towards multiple visual fields, synchronized with a display panel to generate images for each field, and a controller to manage this synchronization, allowing the image to be displayed only on the viewer's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stereoscopic method with two image planes is used, then 3D image is generated, but viewer can only see 3D images within a very restricted region and head movement causes image inversion
Solution Approach 1:
The patent employs a dynamic light source unit that can change the direction of emitted light in real-time. By sequentially directing light toward different visual fields corresponding to multiple viewing positions, the system adapts to viewer head movements and maintains stable 3D images across an extended viewing region without causing image inversion.
Solution Approach 2:
The patent divides the viewing region into multiple discrete visual fields, each corresponding to a specific viewing position. The light source unit sequentially directs light toward each visual field, and the display panel generates separate images for each field. This segmentation allows the system to provide stable 3D images at multiple positions rather than relying on a single fixed viewing region.
2Adaptability or versatility
If multiple point light sources are flickered sequentially to adjust light direction, then multi-view 3D images are created, but power consumption increases
Solution Approach 1:
The patent implements selective flickering of point light sources based on detected viewer position. Rather than sequentially activating all light sources for all possible viewing positions, the system activates only the subset of light sources corresponding to the actual viewer location. This partial action reduces power consumption while maintaining multi-view capability when multiple viewers are present.
Solution Approach 2:
The patent incorporates a sensor that detects viewer position and provides feedback to the controller. Based on this feedback, the controller adjusts which point light sources are activated and directs light toward the appropriate visual fields. This feedback mechanism ensures that power is consumed only when and where needed, reducing overall power consumption while maintaining adaptability to viewer movements.
3Adaptability or versatility
If light is emitted in multiple directions towards multiple visual fields, then viewing region is extended, but device complexity increases
Solution Approach 1:
The patent designs the light source unit to serve multiple functions: it can emit light in multiple directions toward different visual fields, and individual point light sources can be selectively activated based on viewer position. This multi-functionality allows a single device component to handle both the extension of viewing region and the reduction of power consumption, rather than requiring separate systems for each function.
Solution Approach 2:
The patent introduces a controller as an intermediary that coordinates between the light source unit, display panel, and sensor. The controller receives viewer position information from the sensor, determines which visual fields require illumination, activates appropriate point light sources, and synchronizes light direction adjustment with image generation. This intermediary simplifies the overall system architecture by centralizing control logic rather than requiring complex direct connections between all components.
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
This solution enables the creation of multi-view 3D images without the need for additional viewing aids, allowing viewers to maintain a clear 3D image across different head positions while reducing power consumption by displaying images only where the viewer is located.
Implementation Method 1
a light guide plate comprising a side surface to which the light emitted from the light source unit is incident, and an upper surface through which the incident light is emitted
Implementation Method 2
an inversed prism sheet for collimating the light emitted from the light guide plate
Data Source
AI summary
A three-dimensional (3D) image display apparatus that includes a surface-light source device for emitting light in a direction which may be sequentially adjusted, is provided. The 3D image display apparatus includes a display panel for generating images by modulating the light emitted from the surface-light source device according to image information. The 3D image display apparatus also includes a controller for controlling the directivity adjustment of the light from the surface-light source device in a time-sequential manner and the image formation for each visual field of the display panel to be synchronized with each other.