Direct-Lit Backlight Viewing Angle Adjustment via Rotating Assemblies
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Solution Overview
Problem
Existing direct-lit backlight display devices and mini-LED display devices face challenges in achieving precise control of the viewing angle, which is essential for protecting personal privacy in public settings.
Innovation Solution
The proposed solution involves a display device with a direct-lit backlight module that includes a backplate, rotating assemblies, light source assemblies, and a rotation control center. This setup allows for precise adjustment of the viewing angle by controlling the tilt and rotation of the light source assemblies relative to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a direct-lit backlight module is used in a display device, then the screen thickness can be reduced and contrast improved, but precise control of the viewing angle becomes difficult
Solution Approach 1:
The patent applies the dynamics principle by making the light source assembly movable rather than fixed. The light source assembly can rotate and tilt relative to the display panel through a rotating assembly, allowing dynamic adjustment of the viewing angle. This dynamic structure enables precise control of light emission angles without requiring complex fixed optical components, thereby improving viewing angle control precision while maintaining relatively simple device structure.
2Manufacturing precision
If liquid crystal cells are used to control viewing angle, then precise viewing angle adjustment is achieved, but the cost increases significantly
Solution Approach 1:
The patent applies mechanics substitution by replacing the optical mechanism (liquid crystal cells) with a mechanical adjustment system. Instead of using liquid crystal cells to control light transmission angles, the patent uses a rotating assembly with a motor to physically tilt and rotate the light source assembly, thereby controlling the viewing angle through mechanical means. This substitution significantly reduces manufacturing costs while achieving precise viewing angle control.
3Adaptability or versatility
If the light source assembly is made adjustable, then viewing angle control is improved, but the device structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the backlight module into independent functional components: a fixed backplate, a movable light source assembly, and a rotating assembly connecting them. This segmentation allows the light source assembly to be independently adjusted without affecting other parts of the display device. The modular design improves viewing angle adjustability while keeping each component's structure relatively simple and manageable.
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
This solution enables precise control of the viewing angle without the need for expensive components like liquid crystal cells, simplifying operations and reducing costs, thereby enhancing market competitiveness and user privacy.
Implementation Method 1
The first rotating assembly controls the light source assembly to rotate and tilt relative to the display panel, and adjusts the angle between a light emitting surface of the light source assembly and the display panel
Implementation Method 2
The threaded motor is connected with each of the first rotation control center and the threaded rod. The first rotation control center controls the threaded motor to rotate. The threaded motor controls the threaded rod to rotate. The threaded nut is mated with the threaded rod and slides along an extending direction of the threaded rod
Data Source
AI summary
A display device and a method for adjusting a viewing angle thereof are disclosed. The display device includes a display panel and a direct-lit backlight module. The direct-lit backlight module includes a backplate disposed opposite to the display panel, at least one first rotating assembly fixed to a side of the backplate facing the display panel, at least one light source assembly disposed between the backplate and the display panel and connected to the at least one first rotating assembly, and a first rotation control center. The first rotating assembly controls the light source assembly to rotate and tilt relative to the display panel thus adjusting an angle between a light emitting surface of the light source assembly and the display panel. The first rotation control center is connected to the first rotating assembly to control the operation of the first rotating assembly.