Do you really understand OCA Optically Clear Adhesive?
1. What is OCA?
OCA (Optically Clear Adhesive) is one of the raw materials of TFT touch screen. It is made of optical acrylic pressure-sensitive adhesive without substrate, and then a layer of optical release film is attached to the upper and lower bottom layers to make a double-sided adhesive tape. A double-sided adhesive tape without matrix material; OCA has the advantages of high cleanliness, high light transmittance, low haze, high adhesion, no crystal points, no bubbles, water resistance, high temperature resistance, UV resistance, etc. , And its thickness is uniform and flat, and the refractive index of OCA is close to that of glass, PC, and PMMA. Long-term use will not cause problems such as yellowing, aging, fogging, detachment from the adhered surface, and bubbles.
All in all, it is the material used to make Touch Panle.
2. how to distinguish good or bad quality OCA?
Good quality OCA has this effect:
1). Can reduce glare, reduce the loss of light emitted by the LCD or Mini OLED display, increase the brightness of the display and provide high transmittance, and reduce energy consumption;
2). Increase the contrast, especially the contrast under strong light; the surface connection has a higher intensity;
3). Avoid Newton’s ring;
4). The surface of the product is smoother without wrinkles, bubbles, impurities, and the display image has almost no effect through OCA optical adhesive.
5). No borders, expand the visible area; good defoaming effect, high yield of TFT touch screen, no yellowing, good rework.
The poor quality OCA is like this:
1). The process of gluing is prone to dead bubbles and cannot be defoamed.
2). After sticking the glue and removing the bubbles, it is easy to cause the bubbles to rebound. Rework is required, which takes time and cost.
3). The glue is prone to yellowing after being used for a period of time.
4). Imprinting will occur when the protective film of the adhesive is peeled off. There will be residual greasy glue and asymmetry around.
All in all, we should pay attention to the following points in the process of purchasing OCA dry glue:
Focus on checking whether there are indentation (the material does not allow joints), creases, white spots, foreign objects, pinholes, depressions, bubbles, glue wrinkles.
3. OCA processing technology:
OCA die-cutting processing plants generally use optical adhesive die-cutting technology, optical adhesive product perforation and sleeve hole technology, optical adhesive linear bubble position adjustment technology; by purchasing OCA optical collagen material, and then according to different customers Combine the process for OCA structure design, precision die cutting or slitting and other preliminary processing and sell it to the assembly plant of the touch screen or display module. Downstream manufacturers establish more comprehensive and close ties.
And according to the different full-fitting processes of different customers, OCA structure design and precision die cutting are carried out after initial processing such as slitting
The 8 inch displays might be affected and delay for an accident.
New iPhone 13 Series will use On-Cell OLED Displays. And it that will be launched in the second half of this year will be exclusively supplied by Samsung Display (SDC)
This is the project management of how sinocrystal handle your customized project relate to displays.
In the rapid development of digital display technology, electronic paper technology has emerged, leading a new era of digital reading and information display with its unique display principle and eye-catching advantages. Unlike traditional LCDs, e-paper features a natural display effect that simulates paper, providing users with an eye-friendly, high-contrast reading experience. This article will delve into the display principles and advantages of electronic paper, and let us explore together ho
"The Characteristics and Applications of Monochrome Displays" explores the key features and versatile use cases of monochrome displays. These displays, known for their simplicity and efficiency, offer high readability in various lighting conditions. They find applications in consumer electronics, industrial settings, healthcare, and retail, among others. As technology advances, higher-resolution monochrome displays and flexible options are on the horizon. The article highlights the con
the advantages of E-paper and E-ink technologies are transforming the digital display landscape. These technologies offer impressive power efficiency, readability in sunlight, high contrast, and clarity, making them ideal for e-readers and a wide range of applications.