Wide Color Gamut Vehicle Infotainment Display Using Quantum Dot Nanocrystals
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Solution Overview
Problem
LCD-based vehicle infotainment display systems have limited color gamut, leading to inaccurate color representation and warm touch-sensitive surfaces due to edge-mounted backlighting.
Innovation Solution
A display device featuring a planar array of blue LEDs with a nanocrystal material that converts blue light into green and red light emissions, positioned away from the touch-sensitive surface, reducing thermal stress and enhancing color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If LCD-based display screens are used with edge-mounted backlighting, then the display structure is simple and compact, but the color gamut is limited and the touch-sensitive surface becomes warm
Solution Approach 1:
The patent extracts the backlighting elements from the edge-mounted position and relocates them to the rear of the display screen. This separation removes the heat-generating backlighting components away from the touch-sensitive surface, thereby reducing the temperature of the touch surface while maintaining the overall compact structure through strategic component placement.
Solution Approach 2:
The patent introduces a light guide plate as an intermediary component between the backlighting elements and the liquid crystal layer. This light guide plate distributes the light uniformly across the display area while physically separating the heat-generating backlighting elements from the touch-sensitive surface, thus reducing thermal stress on the touch surface.
2Illumination intensity
If LCD-based display screens are used, then the display structure is simple, but the color gamut is limited to 72-74% of NTSC standard
Solution Approach 1:
The patent employs a composite light guide plate structure incorporating quantum dot materials or phosphor layers that convert the broad-spectrum backlight into enhanced spectral distributions. This composite material approach expands the color gamut by introducing specific wavelength conversions while maintaining the simplicity of the overall LCD structure.
Solution Approach 2:
The patent modifies the spectral parameters of the backlight by using quantum dot layers or phosphor materials with specific emission characteristics. By changing the wavelength distribution parameters of the backlight source, the display achieves an expanded color gamut exceeding 72-74% NTSC while keeping the display structure relatively simple.
3Volume of moving object
If edge-mounted backlighting elements are positioned near the touch-sensitive surface, then the display structure is compact, but thermal stress on components increases
Solution Approach 1:
The patent extracts the backlighting elements from their conventional edge-mounted position near the touch surface and relocates them to the rear of the display assembly. This extraction increases the distance between heat-generating components and temperature-sensitive components, thereby reducing thermal stress while maintaining a compact overall device volume through optimized spatial arrangement.
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 provides more vibrant color output and reduces thermal stress on the touch-sensitive surface, improving user experience and extending the display's lifespan.
Implementation Method 1
A display device features a planar array of blue LEDs with a nanocrystal material that converts blue light into green and red light emissions
Data Source
AI summary
A display device includes a planar array of blue light-emitting diodes (LEDs) that are each configured to generate a blue output light, wherein the planar array is positioned parallel to a light-receiving surface of a liquid crystal module and a nanocrystal material that is disposed between the planar array and the liquid crystal module, and the liquid crystal module. The nanocrystal material is configured to: receive the blue output light, convert a first portion of the blue output light to a green light emission, convert a second portion of the blue output light to a red light emission, and transmit a remainder portion of the blue output light. The liquid crystal module is configured to generate an image that includes a portion of the green light emission, a portion of the red light emission, and a portion of the remainder portion of the blue output light.