Dual Vision Grating Light Redirection for Brightness
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Solution Overview
Problem
Existing dual vision display apparatuses have a low effective utilization rate of light due to overlapping images in the middle region, resulting in insufficient brightness at the left and right viewing angles.
Innovation Solution
A grating with alternating light-transmitting and light-shielding portions, each containing a first and second lens device that converges light towards different angles, redirecting light from the overlapping region to improve brightness and utilization at the viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a grating is disposed at the light exiting side of the display panel to enable dual vision display, then different images can be displayed for viewers at left and right sides, but the effective utilization rate of light is low due to overlapping images in the middle region
Solution Approach 1:
The grating is divided into multiple light-transmitting portions and light-shielding portions arranged alternatively. Each light-transmitting portion includes first and second lens devices that segment and redirect light to different viewing angles, preventing overlap in the middle region and improving light utilization while maintaining dual vision capability
Solution Approach 2:
Different regions of the grating are assigned different functions: light-transmitting portions with lens devices redirect light to left and right viewing angles, while light-shielding portions block light in the middle region where overlapping would occur. This local differentiation resolves the contradiction by optimizing light distribution for dual vision display
2Loss of energy
If light is redirected from the overlapping region to improve brightness at viewing angles, then effective light utilization increases, but the structural complexity of the grating increases
Solution Approach 1:
Multiple functions are merged into a single grating structure: light transmission, light shielding, and light redirection are all achieved within one integrated grating component. The first and second lens devices are combined in each light-transmitting portion to handle different viewing angles simultaneously, reducing the need for separate components
Solution Approach 2:
The grating serves multiple purposes: it enables dual vision display, redirects light to improve brightness, and prevents overlapping in the middle region. The lens devices within the grating perform both light convergence and angular redirection functions, making the structure multi-functional and justifying the increased complexity through enhanced performance
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 grating enhances the effective utilization of light, increasing brightness at the left and right viewing angles by redirecting light from the overlapping region, thus improving the overall light efficiency of the dual vision display apparatus.
Implementation Method 1
the first lens device is configured to converge a light incident onto the first lens device towards a first direction so as to give an image display at a first view angle
Implementation Method 2
the second lens device is configured to converge a light incident onto the second lens device towards a second direction so as to give an image display at a second view angle
Implementation Method 3
A grating is an optical element for enabling chromatic dispersion of lights by means of multiple-slit diffraction principle
Data Source
AI summary
A grating for dual vision display and a dual vision display apparatus are disclosed. The grating can include a plurality of light-transmitting portions and light-shielding portions arranged alternatively. Each of the light-transmitting portions includes a first lens device and a second lens device. The first lens device is configured to converge light incident onto the first lens device towards a first direction so as to give an image display at a first view angle; and the second lens device is configured to converge light incident onto the second lens device towards a second direction so as to give an image display at a second view angle.