Conventional VA (Vertical Alignment) LCD utilize a black background with white character display mode, featuring high contrast, fast response, low power consumption, and long lifespan. When combined with screen printing or color filters, they can achieve color effects and are widely used in various fields such as home appliances, medical devices, automobiles, and precision instruments. However, conventional VA LCD have a 10-15° blind zone at oblique viewing angles (where contrast ratio decreases significantly), preventing clear display performance from those angles.

In recent years, the mature No-Blind-Zone AMVA (Advanced Multi-domain Vertical Alignment) LCD in the industry, also known as Full-Viewing-Angle VA LCD, addresses the inability of conventional segment VA LCD to achieve wide viewing angles.

The working principle of an LCD involves controlling the amount of light transmission by applying an electric field to rotate liquid crystal molecules, thereby achieving image display. Due to the inherent shape, structure, and arrangement limitations of the liquid crystal molecules themselves, achieving full-angle light transmission is impossible, inevitably resulting in a viewing angle blind zone.

Full-Viewing-Angle VA LCD employ advanced AMVA (Multi-domain Vertical Alignment) panel technology. By incorporating several first hollow-out structures within the COM electrode and several second hollow-out structures within the SEG electrode, an orthogonal overlapping arrangement of the COM and SEG electrodes is achieved. This structural design causes the first hollow-out structures in the COM electrode and the second hollow-out structures in the SEG electrode to be arranged parallel, alternately, and equidistantly. This effectively eliminates the oblique viewing angle blind zone present in conventional VA products, thus achieving a 178° ultra-wide viewing angle display effect.

Currently, only a few manufacturers have mastered this AMVA technology. Furthermore, there are differences in the hollow-out shapes, dimensions, and process control among different manufacturers, leading to variations in contrast ratio control within the former blind zone. After years of R&D and improvement, our company’s AMVA technology for Full-Viewing-Angle VA LCD has reached industry-leading levels, capable of providing a wide viewing angle display effect ensuring a consistent visual experience from any viewing angle to the naked eye.

The cost of Full-Viewing-Angle VA segment LCD is slightly higher than that of conventional VA segment LCD (approximately 10% higher), while other performance characteristics are completely identical. For fixed display content, the performance of Full-Viewing-Angle VA segment LCD can fully match that of TFT (Thin-Film Transistor) displays. However, their mold cost and unit price are far lower than those of TFT products, facilitating differentiated design changes and allowing for the use of the same external housing. Without changing the housing and mainboard hardware (FPC interface definition remains the same), multiple LCM (LCD Module) common-mode products with different display content can be developed simultaneously, enabling rapid differentiated product placement.

These segment LCD support various driving methods and are compatible with static drive (low power consumption), dynamic drive (multiplexing), or hybrid drive. Segment LCD have low driving voltage (typically 3-5V) and lack high-frequency refresh signals, resulting in minimal electromagnetic interference (EMI) to surrounding electronic equipment. This makes them suitable for products in fields sensitive to EMI, such as medical and aviation. They can operate in a wide temperature range from -40°C to 90°C, have a lifespan of up to 20 years, and their size and shape can be flexibly customized. Large quantity orders can be delivered within relatively short cycles, meeting the delivery demands for popular products.