Question

What is a crystal film screen?

Answer 1

In the display device sector, crystal film screens are transparent displays that utilize bare-die LED chip implantation technology. Using a flexible transparent PCB or PET substrate, the LED chips are attached to the transparent substrate in an extremely thin form through a vacuum sealing process, achieving over 95% transparency.

This product is ultra-thin (thickness can be controlled within 1mm), bendable (curvature radius up to 5mm), and modularly assembled. It is widely used in architectural glass curtain walls, commercial display windows, and transportation glass, for example, displaying real-time information on bus curtain walls.

In the screen protection sector, crystal film refers to a film made of highly transparent PVC or PET. It is bonded to the screen through a cold or hot lamination process, achieving a light transmittance of up to 98%. However, its protection is relatively weak, with a scratch resistance rating of typically 2H-3H. It is primarily used in applications where high-quality display quality is required but strong protection is not. For example, the AR crystal film specifically designed for the iPhone 4 utilizes a 4H hardness coating to enhance scratch resistance while maintaining a 99.5% UV rejection rate.

Answer 2

Crystal film screens, also known as LED crystal film screens or LED transparent screens, are a new type of display screen that uses bare die bonding technology to precisely mount LED chips on a flexible transparent substrate.

The following is a detailed introduction to crystal film screens:

I. Technical Principle and Structure

Technical Principle: Crystal film screens use bare die bonding technology to precisely mount ultra-thin LED chips on a transparent substrate. The light board utilizes transparent crystal film film with a transparent mesh circuit etched on the surface. After the components are attached, they are secured using a vacuum sealing process, creating a thin, transparent display effect.

Structural Components: These screens primarily consist of a substrate (flexible transparent PCB or PET material), LED chips, a driver chip, and a control system. The substrate provides the supporting structure, while the LED chips serve as the display units. The driver chip and control system enable precise pixel control.

II. Core Features

Lightweight, Thin, and Transparent: At only 1.35mm thick and weighing only 1-3kg/㎡, with a light transmittance of up to 95%, the screen is as transparent as crystal and virtually invisible when not in use, minimizing indoor lighting. Flexible and Bendable: Utilizing a flexible substrate, it supports 180° curvature with a minimum bend radius of 5cm, allowing it to fit hyperbolic glass curtain walls or custom-shaped art installations.

Modular Design: It supports arbitrary cutting, regardless of size or shape, to meet the customized needs of different scenarios.

Wide Viewing Angle and High Brightness: With a 160° viewing angle, it offers seamless viewing without blind spots or color cast. Peak brightness reaches 4000cd/㎡, ensuring vibrant images even in bright outdoor conditions.

III. Advantages

High Transparency: 95% light transmittance allows the displayed content to optically overlap with the background, creating a visual effect of blending reality and illusion.

Easy Installation: No steel structure is required; it adheres directly to the glass surface using 3M adhesive or self-adhesive tape, significantly improving installation efficiency.

Energy-Saving and Environmentally Friendly: Adjustable brightness reduces energy consumption and emissions, and the material is free of harmful substances, meeting environmental and health standards.

Weather-Resistant: Adapts to a variety of environmental conditions and maintains stable performance in outdoor settings.

IV. Application Scenarios

Architectural Decoration: Attached to doors, windows, partition glass, or building curtain walls, integrating a digital visual interface with structural functionality.

Retail: Used in window displays, dynamic images attract customers' attention and enhance product presentation.

Stage Performances: Serves as a stage backdrop or special effects installation, enhancing the immersive and visual impact of performances.

In-Vehicle Displays: Used in the glass areas of taxis, buses, and other vehicles to display information and advertisements.

Smart City: Serves as an information dissemination terminal in the "100 Cities, 1,000 Screens" project, supporting city promotion, public services, and other functions.

V. Comparison with Other Transparent Screens

Differences from LED Film Screens: Crystal Film Screens utilize bare die ball bonding technology, resulting in higher transparency (95% vs. 70%-95% for film screens), lighter weight (1.3kg/㎡ vs. 2-4kg/㎡ for film screens), and support 180° curvature. The difference from LED holographic screen: Holographic screen achieves three-dimensional imaging through optical algorithms, with a transparency rate of ≥80%, while crystal film screen focuses on two-dimensional high-definition display, but both are superior to traditional displays in flexibility and ease of installation.

Answer 3

LED crystal film screens are a new type of display device that utilizes bare LED die implant technology. Using a flexible transparent PCB or PET substrate, the screen achieves a thin, lightweight, and transparent appearance by etching a transparent mesh circuit and vacuum-sealing it.

Its core features include: high transparency (up to 95%), ensuring no light loss during content playback, and an invisible screen. It is flexible, lightweight, and can be bent and cut, with a thickness of less than 2mm, making it easy to transport and install. Its high brightness and color reproduction support high-definition display and adaptability to strong light conditions. It is also easy to install, requiring no steel structure and can be directly bonded to glass.

It has a wide range of applications, including commercial advertising (window displays, curtain walls), in-vehicle displays (taxi and bus windows), stage backdrops, and home decoration.

While its technical advantages lie in its modular design and strong weather resistance, it also presents challenges such as a narrow viewing angle and a high failure rate.

As the technology matures, its advantages in mass production are gradually becoming apparent in small and medium-sized applications (such as in-vehicle and window displays). Its market potential lies in applications requiring thinness, transparency, and customization.