Multimodal Display Device Switching Coherent Light Modes
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Solution Overview
Problem
Current dynamic holographic display devices are limited by small viewing angles and limited movement range, restricting their ability to meet diverse user needs for stereoscopic image viewing.
Innovation Solution
A display device comprising a backlight module that emits coherent and incoherent light, a spatial light modulator, and a liquid crystal lens, controlled by a module to switch between different light modes and image types, enabling holographic, naked-eye 3D, and 2D display modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-function holographic display device is used, then stereoscopic image display capability is achieved, but viewing angle and movement range are limited
Solution Approach 1:
The display device is designed to perform multiple display functions including holographic display, naked-eye 3D display, and 2D display by switching between coherent light and incoherent light modes. The spatial light modulator and liquid crystal lens work together with controllable light sources to achieve different display modes, making the device universal and adaptable to various viewing needs.
Solution Approach 2:
The display device dynamically switches between different operational states by controlling the light source type (coherent/incoherent) and the liquid crystal lens focal length. This dynamic adjustment allows the system to adapt between holographic mode, naked-eye 3D mode, and 2D mode, resolving the contradiction between versatility and viewing stability.
2Manufacturing precision
If coherent light is used for holographic display, then stereoscopic image quality is improved, but device complexity and light source requirements increase
Solution Approach 1:
The system changes the coherence parameter of the light source to switch between holographic display mode (requiring coherent light) and other display modes (using incoherent light). By controlling the light source coherence and the liquid crystal lens focal length, the system achieves high-quality holographic images when needed while reducing complexity for other modes.
3Adaptability or versatility
If multiple light sources are added to enable mode switching, then display versatility is improved, but device structure and control complexity increase
Solution Approach 1:
The display device achieves multiple display modes (holographic, naked-eye 3D, and 2D) through a unified optical system that switches between coherent and incoherent light sources. The spatial light modulator and liquid crystal lens serve multiple functions across different modes, reducing the need for separate dedicated components for each mode.
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 device can switch between multiple display modes, overcoming limitations of single-function displays by providing enhanced viewing angles and versatility, allowing users to select among holographic, naked-eye 3D, and 2D modes.
Implementation Method 1
a liquid crystal lens... controlling deflection of liquid crystal molecules in the liquid crystal lens
Implementation Method 2
a spatial light modulator configured to display one of at least two types of image information
Implementation Method 3
a backlight module configured to emit coherent light and incoherent light selectively
Data Source
AI summary
This present invention relates to a display device. The display device may include a backlight module configured to emit coherent light and incoherent light selectively, a spatial light modulator configured to display one of at least two types of image information, and a liquid crystal lens. The spatial light modulator and the liquid crystal lens may be sequentially disposed on a light exit path of the backlight module.