Backlight Module Beam Splitting Film Multi-User Stereo Vision
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Solution Overview
Problem
Conventional naked-eye stereo display technologies can only generate a single vision zone at the center, limiting multiple users' ability to view stereo images simultaneously, and are inconvenient for users who wear corrective glasses.
Innovation Solution
A backlight module incorporating a beam splitting film with strip-shaped protrusion structures and a light guide plate, allowing light beams to be reflected into different directions to create multiple vision zones, enabling multiple users to view stereo images from various angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional naked-eye stereo display technology is used, then the structure is simple, but only one vision zone can be generated at the center, limiting multiple users from viewing simultaneously
Solution Approach 1:
The beam splitting film is divided into multiple regions with different inclination angles. Each region directs light to different viewing zones, creating multiple vision zones simultaneously. This segmentation allows one optical component to serve multiple users at different positions without requiring separate optical systems for each user.
Solution Approach 2:
Different regions of the beam splitting film have different local properties (different inclination angles). The first region has a first inclination angle directing light to a first viewing zone, while the second region has a second inclination angle directing light to a second viewing zone. This local differentiation enables multiple viewing zones from a single film structure.
2Ease of operation
If special glasses are used for stereo display, then left eye and right eye can view images from different angles, but users with corrective vision requirements experience discomfort and inconvenience
Solution Approach 1:
The patent extracts the beam splitting function from the required glasses and integrates it directly into the display system's backlight module. The beam splitting film is incorporated into the backlight assembly, eliminating the need for users to wear separate stereo glasses while still providing the necessary left-eye and right-eye image separation.
3Area of stationary object
If a single vision zone is generated at the center, then the optical structure is simple, but users outside the vision zone cannot view the stereo image
Solution Approach 1:
The patent introduces angular differentiation in the beam splitting film structure. Instead of a uniform single-angle beam splitter, the film incorporates multiple regions with different inclination angles, adding an angular dimension to the optical design. This enables light to be directed to multiple viewing zones at different angles simultaneously, expanding the effective display area.
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 allows multiple users to simultaneously view and share stereo images from different angles by forming multiple vision zones, enhancing the usability and accessibility of stereo displays.
Implementation Method 1
Each of the strip-shaped protrusion structures has a first inclined surface group and a second inclined surface group. The first inclined surface group and the second inclined surface group are inclined to the first surface, and an inclining direction of the first inclined surface group relative to the first surface is opposite to an inclining direction of the second inclined surface group relative to the first surface.
Implementation Method 2
The light guide plate has a third surface, a fourth surface opposite to the third surface, and two light incident surfaces connecting the third surface and the fourth surface. The two light emitting elements are capable of respectively emitting two light beams. The two light beams are capable of respectively entering the light guide plate through the two light incident surfaces, and are transmitted to the beam splitting film through the third surface.
Data Source
AI summary
A backlight module including a beam splitting film, a light guide plate, and two light emitting elements is provided. The beam splitting film includes a light transmissive plate and multiple strip-shaped protrusion structures. Each of the strip-shaped protrusion structures has a first inclined surface group and a second inclined surface group. The first inclined surface group includes a first inclined surface and a second inclined surface with different slopes. The second inclined surface group includes a third inclined surface and a fourth inclined surface with different slopes. The light guide plate is disposed beside the beam splitting film. The two light emitting elements are respectively disposed at two opposite sides of the light guide plate and capable of flickering alternately. A stereo display apparatus is also provided.