Backlight Module Reflective Prism Light Mixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices face issues with uneven backlight illumination due to concentrated LED light sources, leading to suboptimal display effects, and existing solutions to improve uniformity increase device thickness and cost.
Innovation Solution
A backlight module comprising a light source layer, a light guiding layer, and a dotted layer with reflective prism units that reflect light emitted by LED units into the guiding layer for total internal reflection, reducing the number of light emitting units and thickness while maintaining uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the density of LED light sources is increased to improve backlight uniformity, then the uniformity of backlight display is improved, but the thickness and cost of the display device are increased
Solution Approach 1:
The patent introduces a light mixing layer as an intermediary component between the LED light sources and the display panel. This layer actively mixes the light from multiple LED sources to achieve uniform backlight distribution, eliminating the need to increase LED density or device thickness. The light mixing layer serves as a mediator that transforms concentrated LED light into uniform backlight illumination.
2Illumination intensity
If the density of LED light sources is increased to improve backlight uniformity, then the uniformity of backlight display is improved, but the cost of the display device is increased
Solution Approach 1:
The light mixing layer acts as a cost-effective intermediary that replaces the need for increased LED density. By introducing this single mixing component, the system achieves uniform backlight without requiring additional expensive LED units, thereby reducing overall device cost while maintaining backlight uniformity.
3Length of stationary object
If fewer LED light sources are used to reduce cost and thickness, then the device thickness and cost are reduced, but the backlight uniformity deteriorates due to concentrated light energy
Solution Approach 1:
The light mixing layer serves as a crucial intermediary that compensates for the reduced number of LED sources. It actively redistributes and mixes the light from fewer LEDs to achieve uniform backlight illumination, thereby maintaining backlight uniformity even with reduced LED density and thinner device structure.
4Quantity of substance
If fewer LED light sources are used to reduce cost, then the cost is reduced, but the backlight uniformity deteriorates due to concentrated light energy
Solution Approach 1:
The light mixing layer is introduced as a cost-effective intermediary solution that enables the use of fewer LED sources while maintaining backlight uniformity. This single mixing component replaces the need for expensive high-density LED arrays, achieving both cost reduction and uniform backlight performance simultaneously.
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 achieves improved backlight uniformity with fewer light emitting units, reducing the overall thickness and cost of the display device by effectively mixing light through total reflection within the guiding layer.
Implementation Method 1
the reflective prism unit is configured to reflect a light emitted by the light emitting unit into the light guiding layer and cause total reflection of the reflected light within the light guiding layer
Implementation Method 2
the reflective prism unit is configured to reflect a light emitted by the light emitting unit into the light guiding layer
Implementation Method 3
an optical structure for extracting light from the light guiding layer is provided within the dotted layer
Data Source
AI summary
The present disclosure provides a backlight module and a display device. The backlight module includes a tight source layer, a light guiding layer and a dotted layer, a plurality of light emitting units is arranged on the light source layer; a plurality of reflective prism units is arranged on one side of the light guiding layer away from the light source layer, and positions of the plurality of reflective prism units are corresponding to the plurality of light emitting units respectively; the reflective prism unit is configured to reflect a light emitted by the light emitting unit into the light guiding layer and cause total reflection of the reflected light within the light guiding layer; and an optical structure for extracting light from the light guiding layer is provided with the dotted layer.