How to make a transparent OLED screen?

The underlying technical architecture of transparent OLED screen

The core innovation of transparent OLED screen lies in achieving a dynamic balance between luminous efficiency and transmittance. Head Sun adopts a multi-layer stacking structure design: on an ultra-thin substrate with a thickness of only 0.1mm, key components such as transparent anode (ITO), organic light-emitting layer (EML), and transparent cathode (Ag/IZO composite layer) are constructed in sequence. By optimizing the material ratio of the electron transport layer (ETL) and the hole transport layer (HTL), Head Sun Laboratory successfully increased the screen transparency to 42%, while maintaining the excellent performance of 1000nits peak brightness and 120Hz refresh rate.

Compared with traditional LCD technology, Head Sun transparent OLED screens has higher advantages: its self-luminous characteristics eliminate the need for backlight modules, reducing the screen thickness by 85% to 0.8mm; each pixel's independent light control technology achieves an ultra-high contrast ratio of 1,000,000:1, maintaining clear visibility even in direct sunlight; the double-sided display function supports the superposition of virtual and real images, creating an immersive interactive experience for digital signage. Actual measured data shows that the 55-inch Head Sun transparent screen has a 22% lower energy consumption than similar products in 30% transparency mode, and its service life exceeds 50,000 hours.

Detailed explanation of the entire manufacturing process of Head Sun transparent OLED

Phase 1: Ultra-precision substrate processing

As the core carrier of the screen, Head Sun uses ultra-white glass (transmittance 92.5%) as the substrate, and uses a magnetron sputtering process to plate a 150nm thick ITO conductive layer, with a surface resistance controlled within 8Ω/sq. The substrate needs to go through 18 cleaning processes, including megasonic cleaning (frequency 950kHz) and plasma activation treatment (power 300W), and the final cleanliness reaches ISO Class 5 standard, with surface particles ≤5/㎡.

Phase 2: Nanoscale organic layer deposition

In an ultra-high vacuum environment of 10⁻⁶ Pa, the precision metal mask (FMM) technology is used for material evaporation:

1. Hole injection layer (HIL): MoO3 material deposition thickness 10nm, improve carrier mobility

2. Light-emitting layer (EML): Red, green and blue pixels use phosphorescent materials, and the thickness is controlled at 40/35/45nm respectively

3. Electron transport layer (ETL): LiF/Alq3 composite structure, thickness 20nm, accelerate electron flow efficiency

The accuracy of this process is required to reach ±1.5μm, and each 55-inch screen needs to complete more than 12 million precise positioning times.

Phase 3: Triple protection packaging process

To solve the water and oxygen sensitivity problem of transparent OLED, Head Sun has developed a new patented technology:

1. The inner layer is deposited with a 200nm silicon nitride (SiNx) film, and the barrier efficiency is 3 times higher than the traditional solution

2. The middle layer uses UV-cured epoxy resin to bond a flexible water-blocking film (WVTR＜5×10⁻⁶ g/m²/day)

3. The outer layer is laser-welded with a stainless steel frame, and the impact strength reaches IK10 level

After 85℃/85%RH accelerated aging test, the screen life is extended to 35,000 hours after packaging.

Phase 4: Intelligent drive system integration

Head Sun's self-developed drive system supports:

1. 4K@120Hz ultra-high-definition signal processing, color depth increased to 12bit

2. Ambient light adaptive adjustment (50-1000nits), dynamic power consumption optimization of 30%

3. Multi-screen cascade control (maximum support 512 screens synchronized)

4. Touch module optional infrared (accuracy ±1.5mm) or projected capacitive (support 10-point touch)

The system is compatible with Android/Windows/Linux platforms, and built-in Head Sun Cloud for remote content management.