Backlight Module Reflection Layer Splicing
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Solution Overview
Problem
Conventional in-screen hole formation technologies for enhancing light transmission in display panels result in visible camera lenses under screen-off states and inability to display RGB colored images due to light absorption by color resistants, limiting full screen design capabilities.
Innovation Solution
A backlight module comprising a substrate with a reflection layer between a light emitting layer and a reflection plate, utilizing high reflectivity white oil and mini-LEDs with individual light intensity control to extend light and reduce assembly precision requirements, along with a light guide plate and diffusion film to enhance light transmission and image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If in-screen hole formation technology is used to enhance light transmission, then light transmission is improved, but camera lens becomes visible under screen-off state
Solution Approach 1:
The invention divides the backlight module into multiple functional layers including substrate, light emitting layer, reflection layer, and light guide plate. Each layer is segmented with specific via holes to control light paths independently, allowing light transmission enhancement while preventing camera visibility through layered optical control
Solution Approach 2:
The light guide plate acts as an intermediary component between the light emitting layer and the display panel. It redirects and distributes light while blocking direct light paths to the camera lens, serving as a mediator that achieves both light transmission enhancement and camera concealment
2Illumination intensity
If color resist is removed from via hole region to enhance light input, then light input is improved, but RGB colored screen image display capability is lost
Solution Approach 1:
The invention transitions from planar color filtering to three-dimensional spatial light control through multiple stacked layers. Each layer (substrate, light emitting layer, light guide plate) contains via holes at different positions and orientations, creating a 3D light path control system that achieves both high light input and color display capability through spatial separation of functions
Solution Approach 2:
Different regions of the multi-layer structure have specialized functions: the substrate provides structural support with via holes for light input, the light emitting layer emits light through selectively positioned via holes, and the light guide plate redirects light locally. This local specialization allows the via hole region to maintain high light input while other layers preserve color display functionality
3Manufacturing precision
If substrate is spliced on reflection plate, then assembly precision requirement is reduced, but light extension uniformity may be affected
Solution Approach 1:
The light guide plate serves multiple functions simultaneously: it redirects light from the light emitting layer, provides structural support for the spliced substrate, and ensures uniform light distribution across the display panel. This multi-functionality allows the spliced construction to achieve both ease of assembly and light uniformity through the light guide plate's light-redistributing properties
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 true full screen technology with invisible cameras and improved light input, reducing black edges and dark edges, and achieving better full screen display and light uniformity through precise light control and reduced assembly complexity.
Implementation Method 1
the reflection layer can effectively replace the reflection plate in function because of a high reflectivity of the reflection layer on the spliced portion between the substrate and the reflection plate, which guarantees extension of light
Implementation Method 2
a light guide plate disposed on the reflection plate
Implementation Method 3
a diffusion film disposed on a side of the light guide plate away from the reflection plate
Implementation Method 4
mini-LEDs of different positions emitting light with different light intensities can be achieved by individual controls to mini-LEDs
Data Source
AI summary
The present invention provides a backlight module and a display device. The present invention splices a substrate on a reflection plate. The reflection layer can effectively replace the reflection plate in function because of a high reflectivity of the reflection layer on the spliced portion between the substrate and the reflection plate, which guarantees extension of light and lowers requirement for assembling precision.