Quantum Dot Light-Converting Layer for DCI-P3 Green Output
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Solution Overview
Problem
Display devices, such as digital monitors, struggle to produce a green light color close to the DCI-P3 color gamut due to yellowish white light temperature, which affects image quality and requires complex and costly adjustments in light spectrum modification.
Innovation Solution
Incorporating a light emitting diode with a light converting layer, utilizing quantum dots or pigment materials to convert blue light into green light, achieving a specific intensity ratio in the output spectrum to match the DCI-P3 color gamut, thereby adjusting the color temperature and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the traditional method of adjusting color temperature by changing the light spectrum is used, then the color temperature can be adjusted, but the process becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent adjusts color temperature by changing the intensity ratio parameter between blue light (380-489 nm) and green light (490-780 nm) wavelengths through quantum dot layer design, rather than complex spectrum modification. By controlling the first intensity integral (blue region) and second intensity integral (green region) to achieve specific ratios, the invention simplifies the adjustment process while effectively modifying color temperature to match DCI-P3 standards.
2Temperature
If the traditional method of adjusting color tone by changing the light spectrum is used, then the color tone can be adjusted, but the process takes much time and burdening manufacturing cost
Solution Approach 1:
The patent incorporates quantum dot materials with predetermined wavelength conversion characteristics directly into the display device structure during manufacturing. The quantum dot layer is pre-configured to convert blue light to green light with specific intensity ratios, eliminating the need for time-consuming post-manufacturing spectrum adjustments. This preliminary configuration ensures DCI-P3 color gamut compliance is achieved immediately upon device assembly.
3Ease of manufacture
If digital monitor white light is used with yellowish color temperature, then the display can be produced, but the image quality is less preferred compared to TV displays
Solution Approach 1:
The patent uses a composite light conversion system combining quantum dot materials with specific photoluminescence characteristics. The quantum dot layer converts blue LED light into green light with precise wavelength control, creating a composite optical output that achieves DCI-P3 color gamut standards. This composite material approach maintains ease of manufacture with blue LEDs while achieving superior image quality through controlled green light emission with specific intensity ratios.
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 enables display devices to produce a green light with a color temperature similar to that of TVs, enhancing visual perception and reducing manufacturing costs by simplifying the adjustment process.
Implementation Method 1
a light converting layer disposed on the light emitting diode... utilizing quantum dots or pigment materials to convert blue light into green light
Data Source
AI summary
An electronic device includes a light emitting diode and a light converting layer disposed on the light emitting diode. The electronic device emits a green output light under an operation of a highest brightness. The green output light has an output spectrum. An intensity integral of the output spectrum from 380 nm to 489 nm is defined as a first intensity integral. An intensity integral of the output spectrum from 490 nm to 780 nm is defined as a second intensity integral. A ratio of the first intensity integral over the second intensity integral is defined as a first ratio, and the first ratio is greater than 0% and less than or equal to 7.5%.