Backlight Module Reflective Housing Trajectory
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Solution Overview
Problem
The existing backlight modules in liquid crystal displays face issues such as low light coupling efficiency, light absorption leading to decreased utilization rates, and increased design complexity and cost due to the use of light guide plates, which also cause chromatic aberration and obstruct the trend towards thinner, lighter designs.
Innovation Solution
A backlight module comprising an optical film and light sources with a reflecting housing and surface, where the reflecting surface and housing have predetermined trajectories, such as Non Uniform Rational B-Spline shapes, to efficiently direct light into the optical film, eliminating the need for a light guide plate and enhancing light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a light guide plate is used to guide light from the light source, then the light can be distributed across the display, but the light guide plate absorbs some lights causing the light utilization rate to decrease
Solution Approach 1:
The patent removes the light guide plate from the backlight module structure entirely. Instead of using a light guide plate to distribute light, the invention uses a reflective housing with a specifically designed reflective surface that redirects light directly to the display panel, eliminating the light-absorbing component and improving light utilization rate.
Solution Approach 2:
Rather than using a light guide plate to guide light forward, the patent inverts the approach by using a reflective housing to bounce light backward toward the display. The reflective surface is designed with a predetermined trajectory to efficiently redirect light that would otherwise be lost, converting what would be wasted light into useful illumination.
2Ease of manufacture
If a light guide plate is used to guide light, then light distribution is achieved, but the light guide plate increases design complexity and manufacturing cost
Solution Approach 1:
The patent eliminates the light guide plate component entirely, simplifying the backlight module structure. By removing this complex component with its specific design requirements and manufacturing constraints, the overall design complexity and manufacturing cost are reduced while maintaining or improving performance.
Solution Approach 2:
The patent changes the design parameters by replacing the light guide plate with a reflective housing having a predetermined trajectory reflective surface. This parameter change simplifies the optical path design and reduces the number of components, thereby lowering manufacturing complexity and cost.
3Loss of energy
If a light guide plate is used, then light can be guided across the display, but the plate's thermal expansion prevents seamless connection with the light source, limiting light coupling efficiency
Solution Approach 1:
By removing the light guide plate, the patent eliminates the thermal expansion issue that prevented seamless connection with the light source. The reflective housing is designed to work directly with the light source without requiring the light guide plate as an intermediary, thus achieving better light coupling efficiency.
4Length of moving object
If a light guide plate is used to guide light, then light distribution is achieved, but the plate increases the thickness of the backlight module, obstructing light-thin development
Solution Approach 1:
The patent removes the light guide plate, which is a thick component that increases overall module thickness. By eliminating this component and using a reflective housing with a predetermined trajectory surface, the backlight module achieves a thinner profile while maintaining effective light distribution.
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 configuration improves light coupling efficiency, reduces material costs, simplifies design, and avoids chromatic aberration, ensuring better image display while saving space and reducing manufacturing costs.
Implementation Method 1
the reflecting housing comprises a first reflecting layer to reflect the lights emitted from the light source to the reflecting surface
Implementation Method 2
a second reflecting layer to reflect the lights emitted from the light source to the optical film
Implementation Method 3
the reflecting surface has the predetermined trajectory; the predetermined trajectory is a Non Uniform Rational B-Spline, and corresponds to the first reflecting layer and the first light source; in the predetermined trajectory, the lights entering into the reflecting surface are reflected by the reflecting surface and enter into the optical film
Data Source
AI summary
The present invention discloses a backlight module and a liquid crystal display (LCD). A backlight module comprising an optical film, at least one light source, at least one reflecting housing and a reflecting surface. The reflecting surface and the optical film are symmetrically disposed with respect to the light source, and are disposed in identical side of the light source; the reflecting housing comprises a first reflecting layer and a second reflecting layer; the reflecting surface has a predetermined trajectory, and corresponds to the first reflecting layer and the light source. In the predetermined trajectory, the lights entering into the reflecting surface are reflected by the reflecting surface and enter into the optical film.