Liquid Crystal Lens Array for Adjustable Viewing Angle Control
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Solution Overview
Problem
Conventional 3D and 2D display technologies lack adjustable viewing angles for light sources, limiting the ability to switch between 2D and 3D display modes effectively.
Innovation Solution
A viewing angle controlling light source device featuring a light emitting array with liquid crystal lens units, where each unit comprises electrodes and a liquid crystal layer, allowing the adjustment of light emergent direction by regulating voltage differences, enabling adjustable viewing angles for 2D and 3D display switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional 3D and 2D display technologies are used, then display functionality is provided, but viewing angle adjustment capability is lacking
Solution Approach 1:
The patent applies parameter changes by utilizing the voltage-dependent refractive index property of liquid crystal materials. By adjusting the voltage applied to the liquid crystal lens units, the refractive index changes, which directly controls the light bending angle and thus the viewing angle. This allows dynamic adjustment of viewing angles without changing the fundamental display structure, resolving the contradiction between adaptability and device complexity.
2Adaptability or versatility
If fixed viewing angle light sources are used, then device structure is simple, but switching between 2D and 3D display modes is limited
Solution Approach 1:
The patent implements multi-functionality by designing the liquid crystal lens array to serve multiple purposes: it controls viewing angles for both 2D and 3D display modes, and can be adjusted dynamically to switch between these modes. The same liquid crystal lens units that adjust viewing angles also enable the light source to function in both 2D and 3D configurations, eliminating the need for separate light source systems for different display modes.
3Ease of manufacture
If color films are used in display devices, then color display is achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces the mechanical/optical system of color films with an electro-optical system using liquid crystal lens units. Instead of using physical color filtering layers that absorb certain wavelengths, the liquid crystal lenses use refractive index modulation to control light direction and color perception. This substitution eliminates the need for color films, reducing manufacturing costs while maintaining color display capability through precise optical control.
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
Enables precise control over light emergent direction for both 2D and 3D displays, reducing costs by eliminating the need for color films and facilitating mass production, while enhancing display performance through adjustable refractive indices and multiple liquid crystal lens arrays.
Implementation Method 1
each of the liquid crystal lens units is configured to adjust a light emergent direction of light emitted by the light emitting units after the light transmitting through the liquid crystal lens unit by regulating a voltage difference between the first electrode and the second electrode
Implementation Method 2
a liquid crystal layer arranged between the first electrode and the second electrode; the first electrode and the second electrode are configured to apply voltages respectively
Data Source
AI summary
A viewing angle controlling light source device and a display apparatus are provided. The viewing angle controlling light source device includes a base substrate; a light emitting array arranged on the base substrate, wherein the light emitting array includes a plurality of light emitting units; at least one liquid crystal lens array arranged on the light emitting array, wherein the liquid crystal lens array includes a plurality of liquid crystal lens units corresponding to the light emitting units one by one, each liquid crystal lens unit includes a first electrode and a second electrode, and a liquid crystal layer arranged between the first electrode and the second electrode, a light emergent direction of light emitted by the light emitting unit after the light transmitting through the liquid crystal lens unit by regulating a voltage difference between the first electrode and the second electrode.