VR Display Light Diffusion Member Reducing Screen-Door Effect
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Solution Overview
Problem
Virtual reality displays suffer from a screen-door effect due to visible light-blocking areas between sub-pixels, degrading image quality by creating a lattice-like mosquito net appearance.
Innovation Solution
A light diffusion member is interposed between the display panel and the optical lens to diffuse light from the light-transmitting areas to the light-blocking areas, adjusting the haze ratio to minimize the perception of the light-blocking areas, thereby enhancing image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a display panel with sub-pixels is used to form images close to the user's eyes, then the viewing area can be made large with small display size, but the light-blocking areas between sub-pixels become clearly visible causing a screen-door effect
Solution Approach 1:
A light diffusion member is introduced as an intermediary component between the display panel and the user's eyes. This member diffuses the light emitted from the light-transmitting areas toward the light-blocking areas, making the light-blocking areas less perceptible and thereby reducing the screen-door effect while maintaining the large viewing area benefit
2Object-affected harmful factors
If light diffusion is increased to reduce the screen-door effect, then the light-blocking areas become less visible, but the image brightness and clarity may be reduced
Solution Approach 1:
The haze ratio of the light diffusion member is optimized to a specific range (5% to 80%) to achieve the right balance. By controlling this parameter, the light diffusion is sufficient to reduce the screen-door effect while maintaining adequate image brightness and clarity for acceptable image quality
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 reduces the perceived width of light-blocking areas, improving the aperture ratio and image quality by diffusing light to the haze ratio that is neither excessively low nor high, ensuring a clear and enlarged image perception.
Implementation Method 1
a light diffusion member, which diffuses light emitted from a light-transmitting area of each sub-pixel in the display panel to a light-blocking area
Data Source
AI summary
A display for virtual reality is discussed, which is capable of alleviating a screen-door effect, thereby improving its image quality. In the display for virtual reality, a light diffusion member, which diffuses light emitted from a light-transmitting area of a display panel to a light-blocking area of the display panel, is interposed between the display panel and an optical lens, whereby a user who views an image displayed on the display panel at a very close position does not perceive the light-blocking area, which improves the image quality of the display.