Backlight Module Optical Fibers Light Uniformity
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Solution Overview
Problem
Large-scale liquid crystal displays (LCDs) face challenges in ensuring the uniformity and distance of light transmission due to the limitations of conventional light incident solutions, which result in significant optical loss and non-uniformity of light beams.
Innovation Solution
A backlight module comprising a back plate with a recessed and arc surface, optical fibers arranged at an inclined angle, and a reflector of U- or V-shape structure, which secures the optical fibers and adjusts their emitting angle, ensuring light transmission without multiple reflections, thereby enhancing light uniformity and distance coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the curved surface of the bottom of the back plate is configured for light transmission, then the light beams can be transmitted within the air, but the transmission distance is limited and uniformity cannot be guaranteed for large-scale LCDs
Solution Approach 1:
The patent divides the light transmission path into multiple segments by introducing optical fibers at different positions and angles. Instead of relying on a single curved surface configuration, multiple optical fibers segment the light transmission function, allowing each fiber to transmit light to specific regions, thereby achieving both long transmission distance and uniform light distribution across large-scale LCDs
Solution Approach 2:
The patent applies local quality by configuring optical fibers with different inclination angles at different locations. The inclination angle of each optical fiber is specifically designed according to its position relative to the back plate, ensuring that light is transmitted uniformly across the entire display area. This local optimization allows each region to have the appropriate light transmission characteristics for its specific position
2Length of stationary object
If light beams are reflected multiple times within the air, then the light can reach farther distances, but the optical loss is serious and energy conservation is compromised
Solution Approach 1:
The patent introduces optical fibers as intermediary elements to transmit light directly from the light source to the display panel. Instead of allowing light to travel through air with multiple reflections, the optical fibers serve as mediators that guide light efficiently over long distances with minimal loss, combining the benefits of long transmission distance with low energy loss
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 solution ensures uniform and efficient light transmission to larger LCDs, reducing optical loss and conserving energy by minimizing multiple reflections, allowing for the use of various light sources including LEDs and sunlight.
Implementation Method 1
light beams from lighting devices and sunlight can be transmitted by the optical fibers
Implementation Method 2
the reflector being arranged at light-emitting locations of the optical fibers so as to adjust an emitting angle of the light beams entering the chamber
Implementation Method 3
the back plate comprising a recessed and arc surface facing toward the optical film, and reflecting the light beams irradiated on the back plate back to the optical film
Data Source
AI summary
A liquid crystal device and the backlight module thereof are disclosed. The backlight module includes a back plate, at least one optical film, a plurality of optical fibers, and a reflector. The optical fibers are arranged to configure at least one light bar of the backlight module. The optical film and the back plate are spaced apart and opposite to each other to define a chamber for the light beams to be transmitted. The optical fibers positioned by the reflector are located at one lateral side of the chamber such that each of the optical fibers and the back plate form a predetermined inclined angle. In addition, the reflector is arranged at light-emitting locations of the optical fibers so as to adjust an emitting angle of the light beams entering the chamber. The back plate reflects the light beams irradiated on the back plate back to the optical film. The uniformity of the transmitted and mixed light beams is guaranteed when the backlight module is adopted in large-scale LCD.