Hybrid OLED Quantum Dot Light-Emitting Apparatus

The patent combines OLED and quantum dot light-emitting units into a hybrid structure where OLED units generate blue light and quantum dot units convert it to red and green light. This merging of different light-emitting mechanisms into a single integrated apparatus reduces the need for multiple separate OLED layers, thereby lowering manufacturing cost while maintaining white light emission capability.

The patent changes the light emission parameters by using quantum dots with specific size parameters to control the wavelength of emitted light. By adjusting quantum dot size, the system can precisely control red and green light wavelengths, achieving better light saturation and color purity compared to traditional multilayer OLED structures.

The patent employs solution-processable quantum dot materials that can be deposited using simple, low-cost techniques such as spin-coating or inkjet printing, replacing complex and expensive epitaxial growth methods. These solution-based quantum dots, while potentially having shorter operational lifetimes than epitaxially grown counterparts, provide sufficient light emission quality at a fraction of the production cost and complexity.

The patent substitutes mechanical/thermal epitaxial growth processes with chemical solution deposition methods. Instead of requiring high-temperature vacuum epitaxial equipment and complex process control, the system uses solution-based quantum dot ink that can be deposited at low temperatures using standard printing or coating techniques, dramatically reducing production complexity.