Quantum Dot Light Emitting Device Wavelength Selector
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Solution Overview
Problem
In liquid crystal display devices, the light rays emitted by the backlight source are not fully utilized due to the scattering of light by the quantum dot layer, resulting in a poorer effect of white backlight.
Innovation Solution
A quantum dot light emitting device is introduced, comprising a quantum dot film, a backlight source, and a wavelength selector. The backlight source emits light in a first band to excite the quantum dots, and the wavelength selector is arranged between the quantum dot film and the backlight source to transmit the first band and reflect the second band emitted by the quantum dots, redirecting the scattered light back to the quantum dot film to enhance light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light rays are emitted by the backlight source to excite the quantum dot film, then the quantum dots emit light in a different band, but the scattered light rays are not fully utilized resulting in poor white backlight effect
Solution Approach 1:
The patent converts the harmful scattering of light rays by the quantum dot layer into a beneficial effect. The wavelength selector reflects the scattered light rays back toward the quantum dot film, allowing them to be re-utilized for excitation. This transforms the previously wasted scattered light into a useful resource, improving both the white backlight effect and light ray utilization efficiency.
Solution Approach 2:
The wavelength selector creates a feedback mechanism by reflecting the scattered light rays back to the quantum dot film. This feedback loop allows the scattered light to be re-captured and re-utilized, ensuring that no light energy is lost. The feedback mechanism directly addresses the energy loss problem while enhancing the overall backlight performance.
2Illumination intensity
If the backlight source power is increased to improve white backlight effect, then the illumination intensity improves, but the power consumption increases and heat-related aging accelerates
Solution Approach 1:
The patent converts the previously wasted scattered light energy into a useful resource through the wavelength selector's reflection function. By capturing and re-utilizing the scattered light rays, the system achieves improved white backlight effect without requiring additional power from the backlight source, thereby reducing power consumption and heat generation.
Solution Approach 2:
The patent recovers the scattered light rays that would otherwise be discarded or lost. The wavelength selector captures the scattered light and redirects it back to the quantum dot film for re-utilization. This recovery process maximizes the efficiency of light energy utilization, allowing the system to achieve better backlight performance without increasing power consumption.
3Illumination intensity
If the backlight source power is increased to improve white backlight effect, then the illumination intensity improves, but heat-related aging is accelerated
Solution Approach 1:
The patent converts scattered light into a beneficial resource, improving backlight performance without requiring increased power input. By efficiently utilizing the scattered light through the wavelength selector, the system achieves enhanced illumination intensity while avoiding the additional heat generation that would result from increasing backlight source power, thereby protecting against heat-related aging and extending product lifespan.
Solution Approach 2:
The patent recovers and re-utilizes scattered light rays instead of allowing them to be lost. This recovery process maximizes energy efficiency and avoids the need to increase backlight source power, thereby preventing additional heat generation. The recovered light contributes to improved white backlight effect while maintaining low heat output, thus protecting the product from heat-related aging.
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 the utilization ratio of light rays emitted by the quantum dots, generating a more effective backlight while reducing the power consumption of the backlight source, thus conserving energy and prolonging the product's lifespan by minimizing heat-related aging.
Implementation Method 1
a backlight source configured to emit light rays in a first band to the quantum dot film to excite the plurality of quantum dots to emit light rays in a second band
Implementation Method 2
a wavelength selector, arranged between the quantum dot film and the backlight source, configured to transmit the light rays in the first band, and to reflect the light rays in the second band emitted by the quantum dot film
Data Source
AI summary
Embodiments of the disclosure provide a quantum dot light emitting device and a backlight module, where the quantum dot light emitting device includes: a quantum dot film including a plurality of quantum dots; a backlight source configured to emit light rays in a first band to the quantum dot film to excite the plurality of quantum dots to emit light rays in a second band; a wavelength selector, arranged between the quantum dot film and the backlight source, configured to transmit the light rays in the first band, and to reflect the light rays in the second band emitted by the quantum dot film to the wavelength selector; and a groove-shaped bracket including two side brackets arranged opposite to each other, and a bottom plate connected between the two side brackets, wherein the backlight source is fixed on the bottom plate, and both ends of the quantum dot film and the wavelength selector are arranged on the two side brackets. The quantum dot light emitting device and the backlight module according to the disclosure improve the utilization ratio of the light rays.