VR Optical System With Dual Light Paths to Reduce Screen Door Effect
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing VR devices suffer from a limited field of view and a significant screen door effect due to low imaging clarity and light utilization, leading to a grainy perception and visible black matrix regions.
Innovation Solution
A VR optical system with an optical path folding module and two light-emitting components emitting optical images along different directions, allowing for adjustable overlapping regions by controlling included angles, thereby superimposing pixel arrays over black matrix regions to improve resolution and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a folded ultra-short focus optical path is used, then the total optical length is reduced, but the light utilization rate decreases and projection brightness is lower
Solution Approach 1:
The patent introduces a second light-emitting component positioned at a different spatial location and emitting light at a different angle (second direction) compared to the first light-emitting component. This multi-dimensional approach allows both optical paths to converge on the same imaging region, effectively utilizing light from multiple directions to compensate for the reduced light utilization rate in the folded optical path, thereby maintaining projection brightness while achieving compact optical length.
2Device complexity
If current LCD screen arrangement and black matrix region are used, then the display structure is simple, but the screen door effect is significant and image clarity is reduced
Solution Approach 1:
The patent uses a second light-emitting component to generate a second optical image that serves as a copy or supplement to the first optical image. This second image is emitted at a different angle and positioned to overlap with the first image in the imaging region, effectively filling in the gaps created by the black matrix region and reducing the screen door effect without requiring a fundamental redesign of the LCD display structure.
Solution Approach 2:
By introducing light emission from a second direction (second light-emitting component), the patent adds a dimensional aspect that allows light to bypass the black matrix region's blocking effect. The second optical image emitted at a different angle complements the first image, reducing the visible black matrix area and improving overall image clarity while maintaining the simplicity of the LCD display structure.
3Volume of moving object
If field angle of view is limited to 90-100 degrees, then the optical system is compact, but the human eye perception is grainy and lacks immersion
Solution Approach 1:
The patent merges the optical paths from two light-emitting components in the imaging region, where the first optical image and second optical image overlap and combine to form a composite image. This merging of multiple light sources effectively increases the field angle of view beyond the limitation of a single compact optical path, improving image clarity and human eye perception while maintaining a compact overall optical system size.
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 system reduces the screen door effect and enhances image clarity by increasing pixel density and brightness through controlled overlapping of optical images, improving the display quality.
Implementation Method 1
an optical path folding module, and a first light-emitting component and a second light-emitting component arranged on periphery sides of the optical path folding module
Implementation Method 2
the first light-emitting component emitting a first optical image along a first direction toward the optical path folding module
Implementation Method 3
the second light-emitting component emitting a second optical image along the second direction toward the optical path folding module
Implementation Method 4
the first optical image being emitted to an imaging region from the optical path folding module along the third direction
Implementation Method 5
the second optical image being emitted to the imaging region from the optical path folding module along the fourth direction and overlapping with the first optical image in the imaging region
Data Source
AI summary
An VR optical system. The VR optical system comprises an optical path folding module (300), and a first light-emitting assembly (100) and a second light-emitting assembly (200) which are arranged on peripheral sides. The first light-emitting assembly (100) emits in a first direction a first optical image towards the optical path folding module (300), the first optical image being emitted in a third direction to an imaging area. The second light-emitting assembly (200) emits in a second direction a second optical image towards the optical path folding module (300), the second optical image being emitted in a fourth direction to the imaging area and coinciding with the first optical image in the imaging area.