Light Guide Plate Display Modules for Thin Local Dimming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mini-LED displays with local dimming are thick and costly, while side-light type LED displays lack local dimming and have poor aesthetic appearance due to thick frames and high power consumption.
Innovation Solution
A display module design with light guide plates and light sources positioned in accommodating spaces between the plates, allowing for thin and light construction, independent control for local dimming, and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mini-LED displays with local dimming are used, then image contrast is enhanced and power consumption is reduced, but the display thickness increases resulting in poor aesthetic appearance
Solution Approach 1:
The patent transitions from traditional edge-lit backlight architecture to a vacuum fluorescence display architecture where the light source is positioned in a vacuum chamber behind the display panel. This dimensional repositioning allows the light source to be physically separated from the front of the display, enabling thin profile while maintaining local dimming capability through independent control of multiple light emitting regions in the vacuum chamber.
Solution Approach 2:
The display is divided into multiple independent light emitting regions corresponding to different local dimming zones. Each region can be controlled independently to achieve local dimming effects. The vacuum fluorescence display panel is segmented into multiple controllable areas that correspond to the local dimming zones, allowing selective activation of different regions.
2Length of moving object
If side-light type LED displays are used, then display thickness is reduced, but local dimming function is lost and image contrast deteriorates
Solution Approach 1:
Instead of placing LEDs at the edge (side-light type), the patent positions the light source in a vacuum chamber behind the display panel. This dimensional change allows the light source to illuminate the panel from behind while maintaining a thin front profile, and enables independent control of multiple light emitting regions to achieve local dimming and high image contrast.
Solution Approach 2:
The patent introduces a vacuum fluorescence conversion layer as an intermediary between the light source in the vacuum chamber and the display panel. This intermediary converts the light from the vacuum fluorescence display into visible light that illuminates the panel, enabling both thin profile and local dimming functionality that side-light type displays cannot achieve.
3Illumination intensity
If mini-LED displays with local dimming are used, then image contrast is enhanced, but manufacturing cost increases
Solution Approach 1:
The patent employs vacuum fluorescence display technology which uses a vacuum chamber containing phosphor materials that can be excited by various light sources. This approach replaces expensive mini-LED arrays with a more cost-effective vacuum fluorescence conversion system that achieves the same local dimming and image contrast enhancement at lower manufacturing cost.
Solution Approach 2:
The vacuum fluorescence display panel serves multiple functions: it acts as both the light conversion medium and the display panel itself. The same vacuum chamber structure provides both the light source housing and the display functionality, reducing the need for separate components and lowering overall manufacturing cost compared to mini-LED displays.
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 design achieves a thin and aesthetically pleasing display with enhanced image contrast and reduced power consumption through modular assembly and independent light source control.
Implementation Method 1
The light source is used to emit a light beam to each of the incident planes. The light beam enters each of the light guide plates through each of the incident planes and exits through each of the exit planes.
Implementation Method 2
The display module further includes a plurality of reflectors. Each of the reflectors has at least one reflective surface, and the light guide plates are respectively accommodated in the reflectors.
Data Source
AI summary
A display module includes a plurality of light guide plates and a light source. Each of the light guide plates has an incident plane and an exit plane. An accommodating space is formed by surrounding the incident planes of adjacent light guide plates of the light guide plates. The light source is disposed in the accommodating space and is used to emit a light beam to each of the incident planes. The light beam enters each of the light guide plates through each of the incident planes and exits through each of the exit planes. A display device having the display module is also provided.