Ambient Light Backlight Module with Diffusion Recessions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight modules for LCDs have poor color performance and high energy consumption due to the use of LEDs or CCFLs, which struggle to produce real colors and efficient lighting, especially for large-size displays.
Innovation Solution
A backlight module that collects ambient light using a light collector, optical fibers, and a fiber light-outputting substrate with a light guide plate featuring light diffusion recessions, which laterally diffuses light to reduce energy consumption and improve color gamut, addressing hotspot issues and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LEDs or CCFLs are used as light sources in conventional backlight modules, then the display can provide backlight for the liquid crystal display panel, but the color performance is poor and the color gamut is narrow
Solution Approach 1:
The patent introduces optical fibers as an intermediary component to transmit ambient light into the light guide plate. This mediator enables the system to utilize natural ambient light instead of relying on conventional LED/CCFL sources, thereby achieving superior color performance and wide color gamut without the limitations of phosphor-based white light generation
Solution Approach 2:
The patent changes the fundamental parameter of light source from artificial (LED/CCFL) to natural (ambient light). By capturing ambient light through optical fibers and redistributing it via the light guide plate with diffusion recessions, the system achieves real color reproduction with wide color gamut that cannot be obtained from conventional backlight sources
2Power
If LEDs or CCFLs are used as light sources in conventional backlight modules, then the display can provide backlight, but the energy consumption is high especially for large-size LCD
Solution Approach 1:
The patent enables the display system to serve itself by capturing and utilizing ambient light from the surrounding environment. The optical fibers and light guide plate work together to harvest free ambient light and distribute it across the display panel, eliminating the need for energy-consuming LED or CCFL backlight sources
Solution Approach 2:
The optical fibers act as intermediaries to capture ambient light energy from the environment and transfer it to the light guide plate. This intermediary mechanism enables the system to convert environmental light energy into display backlight, dramatically reducing power consumption compared to conventional electric light sources
3Loss of energy
If light is transmitted through optical fibers to the light guide plate, then ambient light can be utilized, but light mixing is insufficient and hotspot problems occur
Solution Approach 1:
The patent segments the light guide plate surface by forming multiple diffusion recessions that divide the incoming light from optical fibers into numerous smaller diffusion zones. This segmentation approach ensures that light from multiple fiber endpoints is distributed and mixed uniformly across the entire display area, preventing localized hotspots
Solution Approach 2:
The diffusion recessions provide localized light diffusion at specific positions where optical fibers terminate. Each recession creates a localized diffusion zone that uniformly distributes light before it propagates across the light guide plate, ensuring uniform brightness and eliminating hotspot problems at light input locations
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 significantly reduces energy consumption, achieves a wide color gamut, and improves display quality by using ambient light, while the light diffusion recessions in the light guide plate mix light uniformly, reducing the light mixing distance and solving hotspot problems.
Implementation Method 1
a plurality of optical fibers connected to the light collector; a fiber light-outputting substrate connected to the optical fibers, wherein the fiber light-outputting substrate includes a plurality of light-outputting openings configured to output the light rays transmitted by the optical fibers
Implementation Method 2
a light guide plate disposed at one side of the fiber light-outputting substrate, wherein the light guide plate includes a plurality of light diffusion recessions, and the light diffusion recessions face the light-outputting openings of the fiber light-outputting substrate
Data Source
AI summary
The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a light collector, optical fibers, a fiber light-outputting substrate and a light guide plate. The optical fibers are connected between the light collector and the fiber light-outputting substrate. The light guide plate is disposed at one side of the fiber light-outputting substrate. The light guide plate includes light diffusion recessions, and the light diffusion recessions face the light-outputting openings of the fiber light-outputting substrate. The present invention can use ambient light rays to form a backlight source.