Quantum Dot Diffuser Plate Brightness Optimization
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Solution Overview
Problem
High haze in light diffuser plates for backlight modules leads to decreased light transmittance and brightness, necessitating increased LED usage and higher costs.
Innovation Solution
A quantum dot diffuser plate with a protective layer, composed of plastic raw materials, inorganic diffusing agents, and titanium dioxide, which enhances light diffusion and protection, allowing for improved brightness and reduced overall cost by optimizing the spectrum for different LED backlights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the haze level of the diffuser plate is increased to improve backlight uniformity, then the light transmittance and brightness decrease, but higher LED power or additional diaphragms are required to compensate, leading to increased overall cost
Solution Approach 1:
The patent uses a composite material system consisting of PMMA base material combined with multiple diffusing agents (TiO2, BaSO4, ZnO in specific ratios) to achieve optimal balance between haze and brightness. The composite formulation allows simultaneous achievement of high backlight uniformity and maintained brightness without requiring additional LEDs or diaphragms
Solution Approach 2:
The patent optimizes the concentration ratios of different diffusing agents (TiO2: 1-5 parts, BaSO4: 5-10 parts, ZnO: 1-3 parts per 100 parts PMMA) to achieve the desired balance between haze and light transmittance. By precisely controlling these compositional parameters, the diffuser plate achieves high backlight uniformity while maintaining sufficient brightness
2Illumination intensity
If more LED or diaphragms are added to compensate for brightness loss, then the brightness is improved, but the overall cost of the backlight module increases
Solution Approach 1:
The patent optimizes the concentration ratios of different diffusing agents (TiO2: 1-5 parts, BaSO4: 5-10 parts, ZnO: 1-3 parts per 100 parts PMMA) to achieve the desired balance between haze and light transmittance. By precisely controlling these compositional parameters, the diffuser plate achieves high backlight uniformity while maintaining sufficient brightness
Solution Approach 2:
The patent uses a cost-effective formulation approach by selecting commonly available diffusing agents (TiO2, BaSO4, ZnO) and optimizing their ratios to achieve optimal performance. This eliminates the need for expensive additional components like extra LEDs or complex diaphragm structures, thereby reducing overall manufacturing cost
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 quantum dot diffuser plate increases brightness by 10% and color gamut by 6% compared to conventional plates, reducing the overall cost of the backlight module while maintaining high haze levels.
Implementation Method 1
quantum dot layer... the diameter of the quantum dots is in the range of 2-12 nm
Implementation Method 2
By adding inorganic or organic light diffusing agents to the base of PMMA... the light can be refracted, reflected, and scattered in different directions
Implementation Method 3
the light can be refracted, reflected, and scattered in different directions, thereby changing the direction of light
Implementation Method 4
the protective layers are also composed of plastic raw materials, inorganic diffusing agents and other materials. Therefore, the protective layer has the function of light diffusion, and at the same time, it can protect the quantum dot layer, prevent water and oxygen from entering the quantum dot layer
Data Source
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AI summary
The present disclosure provides a quantum dot diffuser plate and manufacturing method thereof, including a quantum dot layer (10), and the upper surface and the lower surface of the quantum dot layer (10) are covered with protective layers (20). The mass percentage of each raw material of the quantum dot layer (10) is plastic raw material 90-99%, stabilizer 0.01-1%, organosilicon 0.1-3%, inorganic diffusing agent 0.1-3%, diffusing oil 0.1-3%, styrene-butadiene copolymer 0.1-2%, magnesium silicate minerals 0.1-6%, quantum dots 0.01-1%, and titanium dioxide 0.2-5%. The mass percentage of each raw material of the protective layer (20) is plastic raw material 90-99%, stabilizer 0.01-1%, organosilicon 0.1-3%, inorganic diffusing agent 0.1-3%, diffusing oil 0.1-3%, styrene-butadiene copolymer 0.1-2%, and magnesium silicate minerals 0.1-6%. The quantum dot diffuser plate of above provides high brightness effect, thereby reducing the overall cost of the backlight module.