What is the manufacturing process and structure of the transparent LED screen?

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(Newswire.net — December 20, 2021) —

Transparent LED Display Manufacturing Process and Structure

Commonly found LED displays on the market typically use a black substrate. Since the black substrate cannot emit light, the appearance is not attractive. And there are some limitations in the app. A transparent LED display is customer service. The transparent LED display principle is a micro innovation of the LED light bar display. The add-on manufacturing process, lamp ball package and control system are targeted improvements, and the hollow-out design is adopted to reduce structural components in view. Blocking, improved permeability and lighting performance. A lighting cavity has an LED component and the LED component is a spliced ​​LED component to reduce the occupied space. 

SMD led display manufacturer working on the component which adopts three-color light emitting diode to display different colors. The spacing between the receiving chambers (dot spacing) can be 3mm, 3.9mm, 5.2mm, 7.8mm or 10mm, in order to avoid affecting the light transmission and reduce costs. The front of the receiving chamber is a convex lens structure to increase the visual size of the illumination point. CEA researchers have demonstrated a process for manufacturing ultra-high-brightness micro-LED displays for next-generation mobile display systems. The process is adaptable to industrial production of integrated circuits. The technology, based on gallium nitride (GAN), is aimed at the rapidly growing advanced vision systems market. 

Advanced vision systems, such as heads-up displays or informational eyewear, can increase safety and performance in areas such as aeronautics or automotive, allowing pilots and operators to always have vital navigation data in their visual field. For the general public, augmented reality glasses or portable projection devices provide driving directions, safety updates, advertisements and other information across the visual field. LED micro-screens are ideally suited to these vision systems: space-saving and energy-efficient, their high contrast and high brightness guarantee high image quality.

New micro LED technology

Within HSC LED, the technological research department of HSC, researchers from the HSC have developed LED technology based on gallium nitride to produce very high luminosity emissive micro-screen devices. Applications for this device are expected to experience tremendous growth in the next three to five years. This technology provides an inexpensive, leading-edge solution to enterprises operating in the rapidly growing mobile visualization system device markets brightness 100 to 1,000 times greater than existing levels. 

The product incorporates other key innovations: epitaxial growth of GAN layers on sapphire, micro-structuring of LED arrays (pixels of 10 microns or less), and hybridization of LED arrays on a silicon circuit. These innovations make it possible to obtain a luminance of one million cd / m² (candela per square meter) in monochrome display and of 100 Kcd / m² for color displays, with a resolution of 2.5 million pixels, on a device less than 2.5 centimeters. This represents an improvement factor of 100 to 1000 over current emissive micro-screens, with excellent energy efficiency. The technology will also make it possible to manufacture very compact products, significantly reducing system integration constraints.

Manufacture of solar panels and LED screens: filters are essential

In electronics, producing in a clean, dust-free environment is crucial. The quality of the air and those of the fluids used must be controlled, as in the food, pharmaceutical or space industries, for example, to protect electronic components from any contamination. On an integrated circuit, micrometric dust can indeed have serious consequences: airborne molecular contamination significantly affects the quality of the electronic components produced and therefore the productivity of industrial sites which manufacture these products or of equipment manufacturers which incorporate these components. This is particularly the case for solar panels and LED screens. To prevent these faults, working in a controlled atmosphere (in a gray or white room) and using filtered utilities and raw materials is imperative. 

The manufacture of an LED screen

Before getting your LED screen, it will go through a long manufacturing process. In this article we will walk through the steps of making a typical LED display. 

The main steps are as follows:

  • Selection and preparation of LED diodes

  • The manufacture of modules

  • Assembly of LEDs and finishing of modules

  • Quality control of modules (Aging)

  • Mounting the modules on the cabinets

  • Mounting the screen for simulation

  • Final quality control

  • They are then placed in cabinets, wiring and power supplies placed

The full screen is turned on to make sure everything is perfect before sending to the end customer 

The manufacture of the modules

The modules are composed of LED diodes, IC drivers, connectors; All these components will be fixed on a PCB (hard plastic board). They pass through a machine which will weld the elements automatically and then pass through an oven to reach a T° of over 260C° in order to weld them. Then they are visually checked by a quality control technician. Once the LEDs are placed on the PCB, they are transformed into modules, with the addition of their support frame and protective mask, making them black and protect the PCB and LEDs. 

LED mounting

A dierent manufacturing process is used for DIP type LED modules and SMD type LED modules, this process is very simple in itself, is the most important step, we are slowly getting closer to the final product. Outdoor DIP LED modules: to ensure the waterproofing of the DIP modules, they are coated with black glue which makes it possible to withstand bad weather. This process is only applied for DIP LEDs intended for outdoor use.

Modules verification or “Aging”

The modules are plugged in and turned on for 72 continuous hours to be tested for proper operation. This step is often overlooked by some manufacturers, but HTV includes it in their specifications and helps eliminate any defective modules. This step is therefore crucial.