Samsung patents display using split quantum dot sheets for better blue light
Samsung describes a display panel that uses blue LEDs to power a two-part quantum dot sheet. The first layer converts light to red and green, while a separate second layer shifts the remaining blue light to a specific wavelength.
In the filing’s own words
A display apparatus includes a light source module including: a substrate, a plurality of light emitting diodes provided on the substrate and configured to emit blue light, a plurality of optical domes, each optical dome of the plurality of optical domes covering a corresponding light emitting diode of the plurality of light emitting diodes, and a plurality of reflective layers, each reflective layer of the plurality of reflective layers being provided in front of a corresponding light emitting diode of the plurality of light emitting diodes in a corresponding optical dome of the plurality of optical domes; a diffuser plate provided in front of the light source module and configured to uniformly diffuse irregular light emitted from the light source module; and a quantum dot sheet provided in front of the diffuser plate and configured to change a wavelength of light emitted from the light source module, wherein the quantum dot sheet includes: a red quantum dot configured to convert the blue light emitted from the light source module into red light; a green quantum dot configured to convert the blue light emitted from the light source module into green light; and a blue quantum dot configured to convert the blue light emitted from the light source module into blue light having a wavelength that is longer than a wavelength the blue light emitted by the light source module.
What exactly they claim (claim 1)
1. A display apparatus comprising: a light source module comprising: a substrate; a plurality of light emitting diodes provided on the substrate and configured to emit blue light having a wavelength greater than or equal to 430 nm and less than or equal to 449 nm; a plurality of optical domes, each optical dome of the plurality of optical domes covering a corresponding light emitting diode of the plurality of light emitting diodes; and a plurality of reflective layers, each reflective layer of the plurality of reflective layers being provided in front of a corresponding light emitting diode of the plurality of light emitting diodes in a corresponding optical dome of the plurality of optical domes; a diffuser plate provided in front of the light source module and configured to uniformly diffuse irregular light emitted from the light source module; and a quantum dot sheet provided in front of the diffuser plate and configured to change a wavelength of light emitted from the light source module, wherein the quantum dot sheet comprises: a red quantum dot configured to convert at least a portion of the blue light emitted from the light source module into red light; a green quantum dot configured to convert at least a portion of the blue light emitted from the light source module into green light; and a blue quantum dot configured to convert at least a portion of the blue light emitted from the light source module into blue light having a wavelength greater than or equal to 450 nm and less than or equal to 465 nm, wherein the quantum dot sheet comprises a first sheet and a second sheet that are separated from each other, wherein the first sheet is provided in front of the diffuser plate and comprises the red quantum dot and the green quantum dot, and wherein the second sheet is provided in front of the first sheet and comprises the blue quantum dot.
Facts
- Company
- Samsung (SAMSUNG ELECTRONICS CO., LTD.)
- Official title
- Display apparatus comprising a quantum dot layer with red, blue and green quantum dots and light emitting diodes with a reflective layer
- Patent number
- US12765132B2
- Application number
- 18082216
- Filed
- Dec 15, 2022
- Granted
- Oct 13, 2026
- Inventors
- 2
- Claims
- 11
Classified under
H10H 20/8512 Electricity & electronicsG02F 1/133603 Physics & computingG02F 1/133606 Physics & computingH10H 20/0361 Electricity & electronicsH10H 20/814 Electricity & electronicsH10H 20/8513 Electricity & electronicsMore from Samsung in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.