According to the latest display backplane research released by TrendForce Consulting, the foldable screen mobile phone market continues to be hot, driving the development of mid to high end backplane technologies such as LTPS (low-temperature polycrystalline silicon) and LTPO (low-temperature polycrystalline oxide). Statistics show that the penetration rate of the two in the smartphone market is close to 57% in 2024; It is expected that by 2025, due to improved yield and effective cost control, the penetration rate is expected to reach 60%. The research report states that LTPS backplane technology is now very mature. LTPS has the characteristic of high electron mobility, which can provide faster switching speed and higher resolution, meeting the display needs of high-end mobile phones. However, high electron mobility also leads to high leakage current in low-temperature polycrystalline silicon, which cannot support low-frequency dynamic refresh adjustment, resulting in overall high power consumption. Research shows that most flagship phones currently use low-temperature polycrystalline oxide (LTPO) backplane technology, while foldable phones with larger screen sizes can achieve image segmentation and different refresh rates through LTPO, balancing multi tasking mode and energy-saving effects. LTPO technology is based on LTPS by adding oxide semiconductors to optimize display performance, including improving the leakage current situation when driving the screen and adjusting the screen refresh rate according to the display content. However, due to the need to stack more layers in the production process of LTPO, its manufacturing process is complex and the manufacturing cost is higher than that of LTPS. Research suggests that the oxide semiconductor backplane technology commonly used in smartphone screens mainly uses materials such as zinc oxide (ZnO) or indium gallium oxide (IGZO). This technology is also commonly used in high-end displays, such as Apple's iPad and MacBook series, and due to the low leakage current of oxide, it has broad application prospects in the field of transparent displays. (New Society)