Diffractive Color Filter for Glasses-Free 3D Display
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Solution Overview
Problem
Current 3D image display technologies rely on binocular parallax and require glasses or complex structures, limiting their effectiveness and user experience in providing a true 3D image without the need for additional equipment.
Innovation Solution
A 3D image display apparatus utilizing a diffractive color filter and a backlight component that emits collimated white light, modulating and diffracting light to create multiple viewing zones, allowing for a glasses-free 3D image display by adjusting light direction and intensity using a tunable optical element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If glasses-type 3D display apparatus is used, then 3D image quality is improved, but device complexity and user convenience deteriorate due to requiring additional equipment
Solution Approach 1:
The patent extracts and eliminates the need for glasses by integrating the 3D display function directly into the display apparatus itself. The display panel is designed to emit light with different optical paths for left and right eyes, allowing viewers to perceive 3D images without any additional equipment.
Solution Approach 2:
The display panel serves multiple functions: it displays 2D images, 3D images, and can switch between different viewing modes. The same display panel structure provides both conventional 2D display and autostereoscopic 3D display capabilities, eliminating the need for separate glasses-type devices.
2Ease of operation
If barrier type or lenticular type 3D display is used, then glasses-free 3D display is achieved, but light efficiency deteriorates due to light blocking structures
Solution Approach 1:
The patent replaces mechanical light-blocking structures (barriers or lenticules) with an optical field-based approach. By controlling the optical paths of light emitted from different regions of the display panel, the system directs light to appropriate viewing zones without physical obstacles, thereby maintaining high light efficiency while achieving glasses-free 3D display.
Solution Approach 2:
The patent changes the optical parameters of light emission by controlling the emission angles and directions of light from different pixel regions. By adjusting these optical parameters, the display creates distinct viewing zones for left and right eyes without requiring additional optical components that would block light.
3Measurement precision
If multiple viewing zones are created for 3D display, then 3D effect is improved, but device complexity increases due to additional optical components
Solution Approach 1:
The patent merges the 3D display function with the basic display panel structure. The display panel itself is designed to emit light in different directions for different viewing zones, combining the functions of image display and 3D effect generation into a single integrated structure without requiring separate optical components.
Solution Approach 2:
The display panel performs the function of creating multiple viewing zones through its own light emission characteristics. By controlling which pixels emit light and in what directions, the display panel itself generates the necessary optical paths for 3D viewing without requiring external optical elements to manipulate the light.
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 apparatus effectively generates a 3D image by diffraction, improving light efficiency and allowing for the selective display of both 2D and 3D images, enhancing user experience without the need for glasses or complex structures.
Implementation Method 1
a diffractive color filter configured to perform color conversion with respect to white light that has propagated through the display element layer and to diffract the light toward a plurality of viewing zones
Data Source
AI summary
A three-dimensional (3D) image display apparatus includes a backlight unit configured to provide collimated white light, and a display panel configured to modulate the light provided from the backlight unit based on image information and to display the light in a plurality of viewing zones. The display panel includes a diffractive color filter in which a diffractive element for providing directivity is disposed on a color filter, thereby improving an optical efficiency in 3D image formation.